Speedway Motors Tech Talk GM 461 Double Hump Chevy SBC Aluminum Heads

[@rosco664]

Had a 327 bored 60 over with flat top pistons and double hump heads. Crane solid lift camshaft and that was the best sounding engine I ever had. Little engine was rowdy.

[@PHILLY214]

Crazy cuz it still prolly made 340hp🤣

[@aidanmoore8768]

@@PHILLY214L79 327 SBC made 350hp from the factory. I’m sure this guy was pushing 400whp in a 3000 pound car.

[@PHILLY214]

@@aidanmoore8768 that comment up there^^ nah man they had 165-170cc Intake runners…no way in hell it would make 400 to the tire that’s like 450+ at the crank….a 327 with fuelie heads and a bump in compression w a nice cam can make a lil over 1hp per cubic inch why I said 340hp maaaaybe 360

[@PHILLY214]

The production 1965-68 327s basically had what he’s sayin^^ all except the .060 over and solid lifters lol so he mighta made 360?…he’ll the Vettes had solid lifters 🤣🤣🤣

[@aidanmoore8768]

@@PHILLY214 either way, 360hp is still enough to have some fun with.

[@Martin750hp]

I dig the raised valve cover rails so you don't need tall valve covers and use your original shorter valve covers to keep a more STOCK look nice! I really like the little details (that will improve the look & function) people come up with that make a real difference! Nice going fellas!

[@nitrofumes2012]

The big thing for me is the screw in studs for the rockers. Iron double jump heads were press in. I can paint these black like the rest of the engine and most people wouldn’t know the difference. Thank you Speedway!

[@PROSTREETS1096]

Not all some were screw in n from factory

[@victorjohnson7512]

Those original double hump heads are getting very hard to find now. I like this idea of a stock looking aluminum head, instead of edelbrock or trickflow. These can even be painted to match the block.

[@adamUDavies]

I've got a matching set on my 327 in my 55 Bel air hardtop , it runs very well. I do wish they had the alternator holes for the mounting bracket. But they look old school 👍

[@thekingsilverado9004]

@Duke Of Prunes Some of the cast alum materials make that easier said than it is done. We tried and wrecked a head here. It actually takes a CNC bore machine to get it right. Most of the Alum heads are a much harder Alum than one would think they are made of which makes modifying em a challenge.

[@danboren6567]

A set of Vortec heads outflow double humps and with a modern combustion chamber make much better power. Double Hump heads are 60's technology, compared to modern heads they suck!

[@milojanis4901]

Cast Iron can also be painted. No advantage there. I agree aluminum is better in most every other way, though... .

[@milojanis4901]

@@danboren6567 Many stock class roundy round race cars have to use the double hump heads, though. There were no stock class race cars running Vortec heads in 1965 on a Malibu SS, or a Corvette!!!

[@johnbehneman1546]

Great video!!! I learned so much!!!! It looks like a great set of heads and accessories for a retro build on the small block Chevy. Thanks for sharing!!!! You made my night!!! Keep up the awesome work!!!! I LOVE your channel!!!!

[@douglascrosby6536]

Where are these heads cast and machined? Why not just machine one end of the heads for accessories? Then they can be used for either application depending on hows they're installed. Unless they're REAL intended use is for those circle track racers that are looking to cheat tech inspections. Why not cut a 5 angle valve job? Who's ports/architecture did these heads copy? That info would tell everyone who's CNC porting programs would work on these castings. Also, your web link says they're forged......and we all know they're CAST....But then the question is, what alloy? 6061? 7076? Heat treated to T6? All details any engine builder would like to know.

[@inmygarage_kenm]

When I called Speedway they told me the heads were cast in China.

[@andrewreece3861]

@@inmygarage_kenmbig surprise there! The flow data on the Trick Flow DHC heads show they have about 20cfm more at 0.500 lift than these.

[@shawntailor5485]

I'm running a set of 461 heads on a little punched 283 ,327 crank stroker . It's a thing if beauty ,slight street port,hard seats ,champherd quench .five angle pockets 160 exhaust ,kept the 194 s so I can punch em again if I want to . Luckily worked at western parts in those days .my little mouse sings sweetly.David Vizard style street port ,Dale Sherman style supertuned holly .wiend stealth intake ,also D V modified .

[@backyardbuilttrucks1]

I have had super good luck with my flotek bbc heads even with a power adder. 4 years now no issues only head i have owned that did not leak past the guides out of the box.

[@Thumper68]

Should offer with or without accessory holes

[@adamantium1983]

I would assume if these are a hit they will do that.

[@matthewewing663]

Trick flow builds a similar head. DHV175 which can be ordered with or without accessory holes.

[@victorbarner6254]

The whole purpose of these is to "look", vintage. Early versions did not have end holes. I have 1964 DH heads and robbed all of the parts from an early Malibu so I could keep it stock looking. GM brackets and pulleys are always the way to go, they always fit stock.

[@ImpalaSSRulz21]

Cool I would have gotten a set of these if I didn't find some NOS heads for my impala.

[@marvingvx1]

Guys, I showed how to do the ultimate mods to 461/186 heads on my channel at PowerTec 10. I won several international sports car & formula 5000 races with these heads. I want to build a stealth motor as one of my KZbin video's. How much work would it take to get these heads to 300 CFM at 0.700 lift?

[@anthonyrowland9072]

trick flow has better flowing double humps, they even have a 200cc version coming. speedway probably sells them...

[@jeanlawson9133]

Shoot for the Moon, I love your thinking....

[@victorbarner6254]

probably need to weld up head, add 2.08 splayed valves. Totally these can not do that.

[@robertterry2838]

So, they are the same... except they are completely different. They are just another modern aluminum head with the addition of double hump markings on the front. Cool, I guess. I’ll keep rockin my 461x’s.

[@TheChev1946]

That's what I was thinking.......they're either the same .....or not ...

[@bobhilly546312156332]

This makes me wanna play around with the 283 in my 65 impala 4 door before I commit to an ls swap

[@Shade_tree_garage01]

LS’s suck anyway.

[@randylankford5775]

Is it a chance you might make some like the 186 heads with the bolt holes?

[@MidwestOptimist]

How can the spark plug be both closer to the center of the cylinder and closer to the exhaust valve?? Are the exhaust valves bigger than the intake valves?

[@76629online]

I guess mentioning the price was just too much to ask for…

[@imright3074]

$650 per head

[@howabouthetruth2157]

@@imright3074 $650 per head is fully assembled with all high performance components, plus a 3 angle valve job.

[@jeremycolston8383]

Would love to have those on a small journal 327 for a T-bucket.

[@aaronanderson7619]

With all the stroker and ls craze, many don't even know about the 327. Damn good little engine. Specially with the 350 horse cam, roller tips and a well tuned carb.

[@rosco664]

I had a small journal 327 bored 60 with double hump heads, flat top pistons, crane solid lift camshaft and that little motor was a beast. I had it in a big 70 chevelle and it would get. Miss that car and engine.

[@bobhoffman5581]

@@rosco664 Imagine how it would have run in an F body. Less weight, more ZOOM... lol

[@Thumper68]

Would like to see comparison to double humps that had 2.02 1.60 valves and head porting and works done to them.

[@magster65]

I built a 327 with them, here's a couple videos of it. kzbin.info/www/bejne/jprZlZ2tqrp-rMk kzbin.info/www/bejne/qqTLlWZqd6l3n7s

[@limabravo6065]

So after all that you didn’t add or make optional accessory bolt holes?

[@bryandouglass9997]

Of course not, I had camel back heads on my 327 in a 70 chevelle, it is the vintage look they are going for. If someone wants holes they are available.

[@milojanis4901]

@@bryandouglass9997 You can also drill and tap your own. I did this successfully on a set of CI double hump castings off a 1963 Corvette. I mocked up the assembly with the accessory brackets, used liquid white Teflon pipe sealer, and never had a leak. I used hard washers of one thickness, and different thickness washers as shims. It really isn't that difficult. CI drills and taps easily. Actually, a little known fact; you need no tapping oil or lube when tapping CI. It has a lot of graphite in it. Oil not needed... .

[@michaeldavis5775]

Trick Flow also makes a great set of double hump aluminum heads that come with the accessory bolt holes.

[@gtbarnes11]

@@milojanis4901 ...people dont try this....1970 DH's has the holes

[@victorbarner6254]

You are missing the point.

[@1SixpenceFan]

The word "so" was used 42 times in 6 minutes and 16 seconds.

[@grngs1]

Sooooooooooooooooooooooooom LOL, I hate that too when someone starts EVERY sentence with SOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO

[@deerslayer5863]

Be way better if they made the 186 bolt hole version also

[@davidreed6070]

If you look closely you'll see the spark plug location on the 461 is close to the deck, not good, with the 462 forward that was changed

[@davidreed6070]

@@Future-Preps35 I know where they are. I do remember the x head having a bigger port. When I built them, there was brodix and brownfield or Chevrolet. I had a pair of 292 heads, that was it in the day. 292 I guess was the first over the counter, 190cc port ex raised .40 no heat riser and of course angle plug. Crane cams would port them, hence the crane head. Long time ago.

[@tipcarson8368]

Why didn't I put the accessory holes

[@craigengelman4534]

i have a 400 small blosk with skat 6inch crank and rods , mega thumper cam , noisy cam gears these heads with port gasket match and match cc done , beehive springs , coming soon whipple 3.0 charger

[@AltonJames-nh6zj]

The 461 are a great idea, however will a 186 version come out, due the primary accessory bolt hole on most post '68 cars, after a point trucks, too are needed to bolt-on AND match the basic accessory, the alternator and water pump, on others the power steering , A/C bracketry ? One other concern, can these heads be ordered with steamholes to match the steamholes on a production SB 400 block?

[@sportsmansparadice42]

How do these heads compare to the L98 113 casting?. Intake, and exhaust volume to be specific.

[@speedwaymotors]

We've seen tests on stock 113's that flowed around 195 cfm @ .500" lift on the intake and around 151 cfm @ .500" lift on the exhaust. The Speedway Motors double hump heads flow 232 cfm @ .500" intake and 173 cfm @ .500" lift on the exhaust. There are lots of variables here, but in general the Speedway Motors head will have bigger valves (2.02/1.60 vs. 1.94/1.50) and bigger chambers (64cc vs. 55.9cc) when compared to a stock L98 113. The L98 113 castings can be ported and stuffed with larger valves to flow in the same range as our double hump heads, but they won't have the same power potential due to the older chamber design. Also, note that the double hump heads are not drilled for accessory brackets, by design.

[@Thumper68]

I have a set of 492 double humps they are the 2.02 1.60 valves all ready to go with springs and valves stud holes tapped already for screw in studs.

[@PROSTREETS1096]

How much

[@Thumper68]

@@PROSTREETS1096 like to get 800

[@PROSTREETS1096]

Where you located

[@Thumper68]

@@PROSTREETS1096 TX

[@mikef-gi2dg]

If it has the accessory bolt holes, I would buy them.

[@jamoshotrod]

They do make them with the holes also

[@mikef-gi2dg]

@@jamoshotrod the devil you say....I looked and looked, missed it I guess.....did you see a part number? Thanks for the info.....

[@arodderz]

@@mikef-gi2dg I had the 041's with moderate porting and 2.02's and 1.60 and that set did have the accessory holes on them.SBC ran amazing.

[@mikef-gi2dg]

@@arodderz i still got a set of 041,and 461 never rebuilt them, going to buy new modern stuff, the speedway stuff looked good, not concerned with the nostalga look. There is a bunch of modern new stuff in the $900 to $1600 range.

[@arodderz]

@@mikef-gi2dg I hear you. Yes, modern heads are the way to go. I went with the Afr 195cc heads and absolutely love them.

[@jeanlawson9133]

Awesome 😎 those who know,, well they just know. Thanks. Nice work.

[@robotskirts]

Well now I know what the dude I RA'd for 20 years ago is up to.

[@kentearly805]

Do these use standard length push rods?

[@victorbarner6254]

Should, but depends what rocker you are using/thickness of head gasket/valve stem height.

[@potshot23]

How much lift can you go before hitting the valve seals??

[@timothyfair6058]

HaHaHA!!!

[@victorbarner6254]

.550 it shows on the website

[@matthewewing663]

I wonder how these flow compared to trick flows DHV 175 double hump heads?

[@thekingsilverado9004]

Matt most of all of it works the same the same as any science... The issue is what the shit is made out of and how it holds up.. Most of this cheap China town reman Tuna Can shit ain't worth the cash.... Let it sit over a New England winter in an unheated garage is the main factor... Most of the shit ain't worth the junk price of what it is made out of...

[@MLFranklin]

When I saw the headline I was wondering the same thing. It would be nice to see a back to back comparison either on the flowbench or dyno or both. Maybe that's a good test for Richard Holdener's channel.

[@thekingsilverado9004]

@@MLFranklin Alot of this stuff regardless of name is made by one of the two major companies. One's in Indiana and another in California. It seems that both Holley and Edlebrock both rely on the same two companies to make alot of their products they market.

[@riverratcoon]

i’m not a engine builder and I was wondering will the symbol ones bolt right on to a 67, 327. Thanks in advance, Jason.

[@jeremiah_c10]

What’s a good roller cam for these heads will be going a stock roller 350 block with 1800-2000 stall and stock rear gears not sure about the ratio on a 84 c10

[@fabricationnation8052]

I know most double hump heads aren't drilled for accessory's.... That's not a job average mechanic should do....are these drilled? I know your going for the old look....but everyone wants power steering

[@trlprk]

Not drilled, but check out Allen grove components. He makes great brackets to run your alternator and p/s within a long water pump and no accessory holes

[@thekingsilverado9004]

Yes but cast heads can handle roller set ups these tinker toys snap past the 400hp build up... They don't hold up shit not even twin Chinese hair dryers....

[@will7its]

@@thekingsilverado9004 First laugh of the day....Thanks

[@michaelpeterson4348]

E Q makes a beautiful set of cast-iron heads that outperform all these heads....

[@jimmysapien9961]

But what about the Weight ?

[@michaelpeterson4348]

@@jimmysapien9961 I’ll take a few more pounds over it constantly overheating engine

[@prevost8686]

And EQ heads aren’t Chinese junk.

[@dendens8188]

What does a complete set cost with no accessory holes with the valves and springs

[@speedwaymotors]

The assembled aluminum double hump cylinder head currently runs $649.99 www.speedwaymotors.com/Chevy-SBC-Assembled-Aluminum-Camel-Double-Hump-461-Cylinder-Head,379621.html

[@scummbagracing4241]

@@speedwaymotors pair

[@bobfultz1937]

I bought a set of these back in the spring from speedway motors for a 1966 350 HP 327. they would not fit the combustion chamber with the factory domed pistons. I modified the combustion chamber to make them work. the fast burn chamber point hit the dome about .010 removing the material i was the able to use them and they worked fine. I did a complete review of this but it was never posted. 0:11 / 7:24 0:11 / 7:24 Speedway Motors

[@jimpanzer07]

They use a very thin head gasket; can you use one that is twice as thick to avoid clearance problems with stock L79 pop up pistons?

[@jeffcolt9185]

You're wrong about something, that head did not come out in 61 it came out in 62, because in 61 all there was was a 283 and the best heads you could get on that was aluminum heads

[@nebrrex6910]

Don't you mean power pack?

[@jeffcolt9185]

@@nebrrex6910 no, power pack heads had a rectangular shaped casting Mark with a point in the middle of it

[@nebrrex6910]

@@jeffcolt9185 I was referring to the year. The 327 came out in '62. In '61 it was just the 283 and the power pack heads.

[@jimmysapien9961]

What about Pyramid Heads - Double Hump comparison ?

[@oe542]

Well...... in 1961..... you could buy a new 327 equipped 1962 model Chevrolet....... sooooooo yes. There’s 327 parts with 1961 date codes.

[@AZpatriot69.]

How do these compare to the Vortecs?

[@petewhite8725]

I've got a set of 461 cast heads,I had a guy wanting to pay 3000 for them for a formula 5000 race car.ive still got them.

[@Shade_tree_garage01]

You have some dinosaur garbage, now they’re not needed

[@probityb4riches251]

You have to run higher compression w aluminum heads, because of thermal heat loss. If you run same it will make less power. Expansion of gases is lower.

[@rustychevy2087]

Interesting never heard that before, thanks

[@gtbarnes11]

Whaaaaat????????????????

[@shawnthomas7404]

bullshit

[@1967davethewave]

Cool, thanks Speedway!

[@141runn]

does these take the same thread reach spark plug?

[@patrickmoore1017]

I love those things!

[@Mattyhacks71]

Anyone have a review on these yet?

[@zAvAvAz]

Are these heads A-356-T6 aluminum or NOT?

[@Frank289100]

A 351 WINDSOR HEAD FROM 69-70 FROM GRANDMA'S STATION WAGON WITH A 2 BARREL CARBURATOR (ON THE INTAKE SIDE ONLY). A NONE RACE ORIENTATED HEAD WITH SMALLER VALVES AND INTAKE RUNNERS, FLOWED JUST AS GOOD AS CHEVY'S BEST HEAD THE FUELIE 2.02. THAT'S HOW FAR AHEAD FORD WAS THAN CHEVY IN ENGINEERING. THAT IS INCREDIBLE AND THE REASON WHY GM/CHEVY TOOK THE WINDSOR DESIGN AS THE FOUNDATION FOR THE CHEVY LS HEAD TODAY. BY JUST INCREASING THE SIZE OF THE VALVES AND RUNNERS AND TO THE STRAIGHTER FORD VALVES DESIGN FROM A 20 TO A 18 DEGREE VALVE ANGLE. AS FOR THE EXHAUST PORTS FOR BOTH THE CHEVY AND FORD THEY ARE BOTH A STRAIGHT SHOT OUT AND THE FORD COULD BE PORTED TO FLOW JUST AS GOOD AS THE FUELIE.

[@Frank289100]

@port nut THE CHEVY 396 BIG BLOCK CAME FROM THE OLD CHRYSLER 318 POLY ANGEL ENGINE PRODUCED FROM THE MID 1950'S UNTIL THE MID 1960'S. SECONDLY THE CLEVELAND WAS THE ULTIMATE IN POLY ANGLE HEAD DESIGN IT IS STATE OF THE ART. IN THEORY ALL THE BIG BLOCK CHEVY WAS IS SLAYED VALVE. THE REST OF THE HEAD ARCHITECTURE WAS POOR. BECAUSE YOU SPLAY A VALVE MAKES IT BETTER, THAT ALL DEPENDS

[@Frank289100]

@@suzukiltz8902 1970 WAS THE LAST YEAR UNTIL EMISSIONS CAME AND KILLED EVERYTHING FOR ALL MANUFACTURERS.

[@stephenkeebler732]

Frank, I think you meant 351 Cleveland, not 351 Windsor...

[@Frank289100]

@@stephenkeebler732 THE STOCK 4V 351 CLEVELAND FLOWED 275CFM. YOU ARE OVER LOOKING WHAT I AM STRESSING HERE. I AM STRESSING THE FACT THAT THOSE STOCK PRODUCTION 351 WINDSOR HEADS, A NONE RACE ORIENTATED HEAD OFF A STANDARD PRODUCTION VEHICLE WITH SMALLER VALVES AND INTAKE RUNNERS. FLOWED JUST AS GOOD AS CHEVY'S ALL OUT PRODUCTION RACE HEAD THE FUELIE 2.02. THE CLOSEST FORD HEAD IN FLOW TO THE CHEVY 2.02 TODAY IS THE GT-40 HEAD WHICH EXPLORERS USED. THEY FLOW 195 AND THE FUELIE FLOWED 200 CFM. LOOK HOW FAR AHEAD FORD WAS THEN CHEVY. BY ENGINEERING THEY WERE ABLE TO DESIGN A HEAD WITH SMALLER VALVES AND RUNNERS TO FLOW LIKE CHEVY'S BEST THE FUELIE HEAD. THIS IS THE REASON GM COPIED THE WINDSOR HEAD DESIGN WHEN THEY CREATED THE LS. THEY JUST RAISED THE INTAKE PORTS LIKE THE AFTER MARKET COMPANIES DID TO PRODUCED A RACE HEAD FORD THE SMALL BLOCK FORD. A CONCEPT FROM THE FORD 427 HIGH RISER GIVING A STRAIGHT SHOT INTO THE CYLINDER FOR GREATER FLOW. FOR YEARS YOU COULDN'T GET A RACE HEAD FOR A FORD WHILE THE AFTERMARKET PRODUCED COUNTLESS RACE HEADS FOR THE SMALL BLOCK CHEVY. IT WAS ONLY UNTIL 1987 WHEN TRICK FLOW STARTED MAKING A RACE HEAD FOR IT, THE FIRST ONE IN HISTORY. THE QUESTION HERE IS WHY DID IT TAKE CLOSE TO 30 YEARS TO PRODUCE A RACE HEAD FOR THE SMALL BLOCK FORD?????????

[@jsteganius6969]

@@stephenkeebler732 Stephen. I think Frank might be getting a bit confused.

[@thombradley4737]

Can you paint those cylinder heads with the original factory colors General Motors used back then?

[@rustychevy2087]

Are you asking permission haha, as long as its high temp paint I dont see why not

[@TargaWheels]

Not going to fool the people who had camelbacks already. Should have just made it identical, but in aluminum, with hardened valve seats, and bronze guides. The raised valve cover rails are a dead give away. If you don't externally copy it to a T, it'll never hit popularity status like the originals.

[@jeanlawson9133]

Well 😎 that's just a negative comment... These heads will far exceed..They weren't trying to be 100 percent copy only improve,and they accomplished that in Spades...

[@mick_1949]

Wow too cool. I know what I'm looking to buy, very soon. 👍

[@jamest4363]

Vortec heads still flow better numbers if I'm not mistaken

[@shaunroland8053]

Yeah, these are still a little behind Vortec with flow numbers, but they're a much better set of heads (durability wise), ready for .550 lift with screw in rockers.

[@nathansumerlin8391]

Are they cast and machined in the USA?

[@carlinshowalter1806]

Doubt it.

[@michaelthomas2876]

Who makes the heads?

[@25vrd48]

I like them .

[@kennydaiker1980]

What's the max rpm u can run without the valves floating,or before u need more lift

[@victorbarner6254]

Depends on the cam and spring pressures/weight of the push rods/rockers.

[@Mike62501]

461-X heads yup had em

[@63Imp283]

Will these work on a 283?

[@super63strat]

I want them

[@jimthomas1989]

I Ported my double hump heads and installed Stainless steel valves, I'm satisfied !

[@joe-hp4nk]

What is the combustion chamber volume?

[@speedwaymotors]

The combustion chamber volume on these is 64cc.

[@nebrrex6910]

@@speedwaymotors Just 10cc larger than the the combustion chamber that this head copied, the Ford 289.

[@will7its]

@@nebrrex6910 Copied? Ford has a different layout....

[@oe542]

Like the 90 OHV pushrod v8 in 1955 that everybody copied and still does to this day.

[@tyrell2159]

What’s the point? A junkyard vortec 350 head will knock the iron and aluminum 461’s. Facts!

[@will7its]

And crack......

[@jarvislarson6864]

Pretty sure the fuelie injection debut was 1957......

[@PrincessTS01]

$650 each head

[@rickhaile2190]

They sound nice. How much are they bare retail?

[@speedwaymotors]

Thanks! Here is the link for the bare cylinder heads: www.speedwaymotors.com/Chevy-SBC-V8-Bare-Aluminum-Camel-Double-Hump-461-Cylinder-Head,379620.html

[@MrBlackbutang]

)$600 a pair. That’s a ford 302 head for cheby

[@HoosierRooster]

flow #'s please....

[@artjones2498]

Id like to put a pair on this killer trick 307 im sneaking together....just about have all the machine work done....time for assembly soon

[@billtribble7197]

trick "307" lol lmao

[@mikef-gi2dg]

@@billtribble7197 If you have found some hp 307 pistons, let me know. I like the little 307's.

[@billtribble7197]

@@mikef-gi2dg .i never owned a 307 . never heard of any hy PO parts for them

[@mikef-gi2dg]

@@billtribble7197 way back in the day trw used to sell forged flat top like the l2256 for 350's and a piston for 283''s as well...long ago, for 307's. I inherited a 72 2bbl 307, 110,000 miles, from a wrecked nova, I re-ringed with bearings, slapped on a performer manifold and cam, hei ignition with the msd module, holley 1850 and headers, 8.5 pump gas beater. I foot braked that B, for 13 or 14 years in multiple plain jane cars. It didn't have the bottom end like a 350, but it would spin to 6500, no problem, with self ported gm993 heads. It was a free motor, deadly consistent foot brake street car motor, never broke any parts, just wore it out with appx, 5000 passes down the strip on 87 octane gas oh and it won many rounds and money, and I was a lousy foot driver half of the time. My other motors were 305's with the same parts, same results, super dirt cheap, round winners. I am going to rebuilt the 307, flat top hyper pistons, or regular cast ones, with 305 vortec heads. I got all this stuff taking up space, and nobody's going to buy it from me. It runs what it runs, super dirt cheap, and when someone askes, and I say 307 they think I am lying. Especially when that can't catch you at the finish stripe, with out going way under.

[@billtribble7197]

Good for u my friend. I saw a 1st gen. Nova that took 1st place $$ with 6 banger week after week. they got such a head start. u couldn't catch it. love what u love

[@joelpierce3940]

Really need accessory bosses

[@BBBILLY86]

drilled and undrilled versions are sold.

[@danboren6567]

These are NOT double hump heads! These are new Aluminum castings updated in numerous ways! Calling them double hump heads is just a marketing gimmick!

[@texasrider4D5]

Yup.. junk.

[@fiddlinjazz]

Would these heads work on a stock 283 sbc?

[@speedwaymotors]

It would depend on how much valve lift the cam has. They should work, but you'll need to check clearance before final assembly happens.

[@63Imp283]

@@speedwaymotors so what is the most lift you can use on a 283? Thanks!

[@DeliriumElectric]

283 has a smaller bore. I wouldn't go any bigger than 1.94" intake valves to be safe

[@jimpanzer07]

Do not use Speedway vintage finned valve covers with roller rockers, got the top end package with heads, intake gaskets and valve covers. They recommend roller rockers with these heads but the included valve covers have some casting materials inside each cover that will interfere with aluminum roller rockers causing valves to hit the pistons and Speedway is unaware of this nor do they care that you have to fix the bent valves, crap!🤬

[@victorvondoom2386]

DZ 302.. engine. would these help low end torque? Also, could these accept 205 values?

[@bobhoffman5581]

No such thing as low end torque in a 302, at least compared to other SB Chevy mills. Mid range to high rpm motor, all day long. lol

[@bobhoffman5581]

P.S. You're wanting low end torque, and you're asking about 2.05" inrake valves? Dude... smh

[@carlinshowalter1806]

Don't think the 11:1 high compression stock pistons will work with this small combustion chamber shape but I could be wrong.

[@Z69Silveraydoe]

I have a set of 461x heads, what does the x mean at the end of the casting number? They didn't have the double Camel hump they have a short sharp rise next to a tall rise with accessory holes. I kept the 1.94 intakes but put new 1.60 seats and stainless valves. This was the first set of heads I learned to replace seats, mill and tap for screw in studs and guide plates and ported & polished when I worked at dover cylinder head in orange park florida. I could never find any information on them other than other machinist telling me they might be 70s truck heads or dz code factory race car experimental heads. Some of the machinist told me the x means experimental. I just want to know if I screwed up some history or just made truck heads better

[@jimmysapien9961]

Pyramid Heads ?

[@gtbarnes11]

read the casting date, but they must be 1970 or newer with the bolt holes. large open chambers "76cc are not hipo anything unless they came with 2.02's ...l82 vette

[@Z69Silveraydoe]

@@gtbarnes11 I'll have to take note of the whole casting number the next time I have the valve covers off for a lash resetting. I know they're 64cc chambers and I knocked it down when I surfaced the decks .010

[@mikeskidmore6754]

You Totally lost me when you said the heads are not drilled and tapped for acceroies.. Small Block Chevy heards had the same accessory thraded holes for years..

[@howabouthetruth2157]

Not the earlier castings, and those were among the best of the camel hump heads. I know, because I once owned a 327 with the early heads with 2.02 intake valves. There were NO accessory holes. Had it in a sweet '66 Chevy short wheelbase fleetside, full custom cab, with original 3.73 posi rear end. Gorgeous truck. ( Truck originally came with a 283. ) Also had a double roller timing chain & gear, 4" Holly intake & 750 single pumper. It would only run oh high test, and ran like a bat out of hell. I'm still kicking myself for selling that truck decades ago.

[@juno4494]

These are great heads (I have a pair), but don't buy them from Speedway! This joke of a company sold me a "guaranteed to fit” header set, but the headers were far to large. Not only did Speedway charge me a 15% “restocking fee” but they wouldn’t even pay for shipping. I spend an average of $10-15k each year on parts to rebuild cars, but I’ll never buy from this company again.

[@JARRETT7121]

They look and sound good in your video but when I call Speedway Sales and Tech to find out where they're made and who's valves you using who Springs you're using the management won't tell me so you just lost the sale I'll go to the competition

[@PROSTREETS1096]

How much are they

[@speedwaymotors]

The price varies, but you can click on these links to see what they are today. Assembled heads: www.speedwaymotors.com/Chevy-SBC-Assembled-Aluminum-Camel-Double-Hump-461-Cylinder-Head,379621.html Bare heads: www.speedwaymotors.com/Chevy-SBC-V8-Bare-Aluminum-Camel-Double-Hump-461-Cylinder-Head,379620.html

[@johnnydoubleu3656]

Are AFR 180cc better than these ?

[@msh6865]

Accessory holes alone would make them better.

[@patrickwendling6759]

CFM ???

[@ryanfry390]

Give us some Mopar and Ford stuff.

[@billfrench9218]

So.... A set of heads & NO way to mount anything to them really einstein gee what was the idea we're in The 21st. Century... 😆 are ya going to make all the free brackets TOO ! 😆 😆 how about a watch with no hands a timeless event as well 😆 😆 😆 😆 😆 😆 😆

[@deletethis5489]

those are not any better than a vortec head which have center bolt and perimeter bolt provisions for valve covers . the alluminum Etec heads are the same and don't require tall valve covers. Edelbrock has valve covers that look like corvette style and you can enjoy the accessory holes. the lack of accessory holes will not give me bragging rights or a big fkn selling point or get me laid .

[@oe542]

You’ve been laid because of the type of cylinder head you were running on your car?

[@fivestar8337]

@@oe542 he did say you can enjoy the Vortec accessory holes. 🤣🤣🤣🤣

[@stephenkeebler732]

If he's dragging a set of Double Hump heads through a Trailer Park, he's got other issues...

[@Stevesbe]

Just get an ls

[@4speed3pedals]

The rail for the valve cover is a dead giveaway as it does NOT conform to OEM looks. Sad, all that effort and come up short.

[@tjed1071]

Might as well run AFR

[@andrewreece3861]

The Trick Flow DHC heads are smoother from the deck to the rail and much better disguised that raised rail.

[@stephenkeebler732]

They don't look like Double Hump heads to me, and I'm mostly a Ford Guy...

[@blownaway4371]

And who's the designer that thought it great to NOT HAVE ACCESSORY BOLT HOLES? Was that some kind of "deal" with GM? AND WHY NOT A 3"-exit exhaust manifold?

[@3NationCultivation]

Originally most accessories had steel brackets to hold them that mounted externally to simplify manufacturing the cast components. Even early blocks didnt have side motor mounts they mounted at the front. As for the exhaust. 3in exits on rams horn style exhausts like that would kill velocity on N/A applications. Most N/A sbc dont need any more than 2.25 exhaust. Going too big can reduce velocity and kill power in your rpm range you use the most.

[@Thomas63r2]

China. These are business opportunity heads: somebody noticed that even if the 461 heads have been eclipsed by modern heads - that nostalgia buyers do not care if they come from China or are weak performers - they just want that rockabilly look.

[@lolbr6818]

$$$, ???

[@michaelpeterson4348]

But what they’re not telling your boys and girls is aluminum cylinder heads will make the engine run noticeably hotter especially in the summertime... ( I do live in a very hot climate of southern California I put aluminum cylinder heads on a small block 350one time I said never again take days off back to cast iron , The weight reduction is not worth the headache of the overheating )

[@milojanis4901]

Absolutely incorrect!!! Aluminum has far superior thermal dispersion properties than does CI. Whatever it was that caused you to run hotter was definitely NOT the aluminum heads. They have every advantage known to man over CI. That's why almost every V8 made now has them. Motorcycles that used air cooling, and made 1-1/2-2 hp per cubic inch haven't used CI for head manufacturing since the 1960s, unless you count H-D, which is another story entirely!

[@gtbarnes11]

yea your head gaskets were l;eaking. pro comp or something cheap, chineese?

[@michaelpeterson4348]

@@jeffallen3382 Go try it and find out for yourselfSomebody told me that this would happen if you put aluminum heads on a small block it would overheat I did not believe them I went ahead and did it anyway should have the engine overheated with those aluminum heads put cast-iron heads back on and everything was fine

[@jaymartin4418]

@@jeffallen3382 You might be ase certified but you don’t understand metals aluminum dissipates heat a whole lot faster the cast iron, therefore having to raise compression or drop chamber size when going to aluminum from cast iron because of the heat dissipation of the aluminum you will lose power so how did motor run hot just from swapping heads did you use the correct headgasket?

[@jaymartin4418]

@@jeffallen3382 I responded to the wrong person but tell me where I was wrong.

[@woog74]

I get that these are reproduction 461s, but no accessory holes in this day and age? GTFO.

[@johncummings7045]

Are they Chinese ?

[@tjed1071]

They must be

[@bryantcurtis2665]

Mopar! Chevy=🐒💨💨💨💨💨

[@thomascoker3600]

it's 1960's technology no comparison to the 21 century heads, are they from china?

[@user-ge2qn6gp4o]

I just bought some Brodix IK series heads. Better heads than these, better price, and they have accessory holes.

[@2mtnbros]

Your bro dix heads don't have the double humps fr the era look for street rodders, that the reason for these