Lykins Motorsports 1970 Mustang 351C Cylinder Head Assembly

[@winstonsewell3849]

Been into Clevelands for over 40 years here in the UK. Have 2 Brit cars with HP 4V Clevelands fitted. Good info 👍

[@biscuitboy3617]

Man, I love high performance Clevelands! A small block Chevy killer if there ever was one! I've ran Clevelands since the 80's and they never fail to light up a set of tires!

[@dalewarriorofthesea3998]

Nice Brent These close chamber 4V,s were the heads along with Cleveland engines that made me a life long Ford Fan Could have been anything with a few tweeks of factory development. The design was the Genesis of Something very Special These motors also sound so sweet

[@danonoveh8114]

Iam with you on that my friend👍🏻💙

[@elmerfudpucker3204]

The basis for every NASCAR Cup engine running right now.

[@strokermaverick]

Big fan, of the Cleveland.

[@fastlaneracing5436]

Do you have a Cleveland in your maverick, and if so what headers did you use? I just picked up a 2v open chamber head Cleveland to put in my 72' mav.

[@fastlaneracing5436]

Thanks Brent great info, good to hear your doing better

[@tomlavendusky8150]

Always good to see one of your cleveland builds. Hope your feeling better

[@philwiggins9199]

From Australia. Back in the 80's, built a few 351C for ski boat, used ported 302C 2V heads fitted with 4V stainless valves, crower solid lifter cam, yella tella roller rockers, comp cam valve springs and retainers - strong performance from this combo....

[@gibbsey9579]

Phi;, You forgot to mention to these US type people that OZ 302c 2V heads had the closed chambers.

[@philwiggins9199]

Hey Gibbsey, absolutely correct, the 302C heads are closed combustion chambers....

[@tonyelliott7734]

Y'all had some really cool stuff available down under that us guys in the states would really love to have, that's for sure.

[@danielwilson6665]

I’m surprised that more of my Cleveland friends here in the States don’t know the details that make Aussie 302C heads such a good choice for performance builds. It’s like the best of both worlds with the quench chambers for decent compression along with the smaller 2-V ports and valves for good intake charge velocity across the rpm range. Those features and more are what makes the Aussie CHI 3-V alloy heads such impressive performers 🏁

[@markfreeborn8493]

APPRECIATION From the CLEVELAND NATION! I get good value/something fron every one of your videos Brent ..Cheers

[@danonoveh8114]

Man those 4Vs are so pretty with those stainless valves and milled surfaces, I just love those cyl heads👍🏻❤️

[@rodneyadamson8270]

My father had a 79 mustang with a 351c, 12:1, Crane .606 mechanical cam, unported heads 5.13 gears best ET 10.85@131 😊

[@Axeman428]

Built many of these along with 428cj engines. The 335 series will make as much power as the cj with less money. Easy 400+ hp with a good intake,hookers and decent hydraulic cam. A little oil system work and it would live and embarrass a big engine. If you go solid roller the sky’s the limit but be prepared to do some pretty extensive oiling system revisions for longevity.

[@danielwilson6665]

I heard a well known builder (Darin Morgan) comment that well prepared Cleveland heads can make more horsepower per cubic inch in naturally aspirated trim, than all of the others including hemi. From what I’ve seen I tend to believe that statement but as expected, other opinions will definitely differ. The typical methods of upgrading the non-priority oiling system aren’t too difficult. It’s been a few years since my machinist installed lifter bore bushings in my Cleveland block but I think the benefits are worth the additional cost.

[@jackwells1452]

I had a 429cj and you could almost stuff a tennis ball in the intake port

[@markfreeborn8493]

That's awesome, I got to see a pair of those😢 CJ heads at a dyno shop 20 years ago

[@danielwilson6665]

Some guys prefer tennis balls for stuffing Ford ports. Beer cans are a favorite too. The brand X guys keep ping pong balls on hand for showing off their “double hump” SBC mini ports . 🏓 🤷‍♂️

[@aguyinnc2865]

Thanks for covering this engine build, I have a '73 Mach 1 351C 2V. These heads seem hard to find these days, but interested in seeing how this turns out. Don't want to spend $$$$ for a set of aluminum heads for the street. But more power and torque would be nice.

[@elmerfudpucker3204]

I've built these engines since my youth in the early 70s on. Factory heads are getting hard to find, especially the 4V quencher heads, and the aftermarket is my first choice nowadays. Stay away from the ProComp, now speedmaster heads. I usually urge folks to go with the 3V CHI heads for steet/strip. I've never had trouble out of those.

[@gorgonbazil2652]

Funny, I have three nice sets... 4V, 2V and 2V Aussie Heads....

[@danielwilson6665]

@@elmerfudpucker3204Good advice. Run don’t walk away from Speedmaster/Procomp. I’ve never heard anyone complain about CHI Cleveland heads. The performance justifies their cost 🏁

[@winstonsewell3849]

Great stuff 👍😊

[@jamesroberts807]

Great job and info as always, have a great weekend Brent😊

[@saxonstangsetc3201]

Great information and presentation!

[@MrKT1955]

Hi Brent, I was wondering why you didn't post a video last week, I look forward to them. Glad you're doing OK. Great info as always.

[@paulolson734]

Love the 4V quench heads (I have 3 sets) but wish they'd seen fit to use the 2V quench heads here in the states.

[@elmerfudpucker3204]

Me too! I put a bunch of 2V heads on 302s and 351s, when that was all we had to go with. They did good, but getting the compression right and the flame travel across those pop ups was some work. Then you had to get the valvetrain and intake right.

[@dalewarriorofthesea3998]

The quench heads in Australia were simply made to lower chamber volumes to maintain compression on the 302 Cleveland variant Both quench types work well with the correct cam profile distinctly different for each style of Port

[@RoyMiller-d8y]

I enjoyed this build.😮

[@craigmorgan3276]

I believe , in 1970 the compression on a 4 v Cleveland was 11 to 1 , and it was rated at 290 hp , not sure if you’re going to be able run that 11 to 1 , for a stock build , and use pump gas , good info on the show

[@rondye9398]

Real Compression reported to be not nearly that high. Seems 'in the day' compression ratios were exaggerated, as the public equated compression with power. Closer to 10.0 - 10.2. Easily compensation for lower quality gas by camshaft design. Engineering intake closing to lower static to 8.5 solves the issue.

[@dennisrobinson8008]

A camshaft swap and exhaust swap from making real power of 450HP or so with over 400ft-lb.

[@rotorr22]

Great tutorial, Brent.

[@theshed8802]

My problem is that I grew up with Cleveland's. Unfortunately, it ruined me for life 😂😂😂

[@benwatkins7600]

Me too, sadly!

[@watsisbuttndo829]

Unfortunately?, sadly?, waddaya mean?. Cheap cleveland days were a glorious time to have been alive!

[@danielwilson6665]

Clevelands are very addictive. The only good habit I have 👍

[@deanstevenson6527]

​​​@@watsisbuttndo829 Except for the loss of 8 pounds of iron in 8 cylinder bores compared to a Small block Chevrolet.. 187 to 189 thou of average block wall thickness verses 245-242 thou on a SBC. Comparatively, Ford takes about 1 pound of iron out of each thinwall cylinder compared to a 350 Chev, and the aftermarket Ford blocks can sit at about 245 thou for cylinder wall thickness at the trust faces, before a 30 thou 4.030" overbore. Plainly, these Thin wall Henry's were the worst for being economical with iron. Thanks HFII, you had to pay for Leman FE block wins somehow.The piston cylinder walls, Ford shell moulded down to 130 thou or less with core shift. Any pre 86 Chev 350, it sits at 180 thou at the thrust faces without core shift. Everywhere on the small 335 engines, FoMoCo took out metal..that's sad if you are rebuilding one.

[@sorshiaemms5959]

Great video have had good luck making power with 2v heads and am going to try to port a set for lower cube motors like to see how this one turns out

[@paulolson734]

Question about these heads for street use. Do you bother with hardened seats for unleaded fuel? I remember the warnings about this and earlier vintage heads being unsuitable for long life with unleaded fuel. I never hear about this any more and it just occurred to me to ask.

[@lykinsmotorsports]

We don't install hardened seats of unless the factory ones are too far gone, or it's a heavy lugging application.

[@rondye9398]

Stainless valves solves the 'micro welding issue' onto the seats. It's mostly an upsell for the machine shop.

[@therory6888]

Thanks for the videos on this engine. With all the craziness about oil mods on the 351 Cleveland. Do you do anything to the oil drain back holes on the heads. Thanks.

[@rachford_racing]

Hey Brent, Thanks for sharing your knowledge on these builds. I have a question on how you check spring height vs spring pressure with the retainer. To me the height mic records a measurement that's under the retainer but I notice you always check pressure with the retainer which measurement includes the retainer. I hope the question makes sense just hoping you can help me understand why you do it that way.

[@lykinsmotorsports]

You have to measure the thickness of the retainer and take it into account.

[@danonoveh8114]

Hi Brent ,, what brand valves are you using on these Cleveland heads, I wish you was local, iam getting a set done as I speak, nice work you do sir💯💯💯

[@danielwilson6665]

As Brent stated in the video, he’s using Manley Stainless Steel Valves for this project.

[@danonoveh8114]

Sorry I missed it​@@danielwilson6665

[@davidreed6070]

I wonder if you put those heads on a bare block and Felt the match of the chambers to the bores what would you find

[@roberthirshfield3571]

What are under cut values do

[@timmiller260]

Got a 70mustang Cleveland 2v last winter re rings and bearings i poilshed the crank in lathe with trap of leather and 1500. To 2000. It was mikeine 1 th.s under set oil gap at 3th.s and primed oil pressure was75 with 3500 drill it looking good to go sounds good to you all.?

[@mrcirino5181]

What cam do you recommend for radical street cars ,I have closed chamber, torker 2 intake in a 70 Mustang four speed car 355 rear end

[@sean5comet]

Best pushrod head. Coyote heads are far superior in every single way

[@harmankardon478]

came to see the valve stem seal install and it was skipped over

[@taylormach1699]

I have a set of those 351C heads 4v , what are those worth.

[@rondye9398]

Well I have a complete 1970 M code engine, machined for adjustable valvetrain, Manly valves, stud girdle, completely ported, standard bore, trw pistons, stock rods with arp bolts, oil restrictors, oil pump with hp spring. Holley strip dominator, Holley 850 DP. What is that worth?