Take a look at the bottom end of a 427 Tall Deck BB Chevy.

[@gregleenyit]

A fellow by the name of Jack Merckle was going low 10s in the early 60s with N/A BBC 427.

[@thereluctantgearhead4544]

Yep, they been going fast since the day they was invented. Hard to beat a bigblock Chevy.

[@thereluctantgearhead4544]

Jungle Jim Lieberman ran 427s in nitromethane burning fuel funny cars back in the 60s. Alot of them were used in AA Fuel Altereds.

[@ChrisMcCutcheon-wj2pp]

That block will clear a 4.5 inch arm with very little clearancing and no small base circle cam needed! Love em

[@itseithergonnaworkoritaint7852]

Very beefy unit! The compression distance on those slugs gotta be over 2.125", those are some long heavy pistons! More rotating mass = more low end torque is probably why they did it that way plus the bean counters probably didn't let them make longer rods for it?

[@thereluctantgearhead4544]

Built to run forever.

[@thereluctantgearhead4544]

I guess they figured the 4 ring pistons would be more durable in a industrial application over the long run. Some of these engines racked up over 500,000+miles. Some ended up in long haul trucking, log trucks, coal trucks, grain trucks etc. Some ran nonstop at 3000rpm for 20+yrs in mines powering generators. Even seen them in big ass fishing boats.

[@thereluctantgearhead4544]

Balancing these cranks to lightweight pistons and rods is a breeze. Only have to remove metal. No Mallory needed. Pretty heavy crankshaft. Strong as hell. Those stock pistons weigh a fuckin ton. 4500- 5000rpm and your pushing it. Mine gonna turn 8000rpm. Gonna use a 5500 stall behind it.

[@itseithergonnaworkoritaint7852]

@@thereluctantgearhead4544 Why not get a 4.500" stroke crank and make it a 518 cid BBC with a .030" overbore and spin that to 8,000 RPM?😎

[@thereluctantgearhead4544]

​@@itseithergonnaworkoritaint7852It'll already be at the power limit of the block at 440ci. 20lbs of boost will make up for any cube deficiency. I thought about stroking it since I already have a few cranks laying around, but I'm just gonna let the Turbos do their thing. Short stroke easier on parts too.

[@charlotteatwater6957]

I've got 5 of these 427 tall decks engines i pulled out of old chevrolet dump trucks are they worth some money

[@thereluctantgearhead4544]

Tough old engines for sure.

[@thereluctantgearhead4544]

Tractor pullers loved them back in the day.

[@thereluctantgearhead4544]

602@24hr. 6/23/23

[@thereluctantgearhead4544]

1K on 6/25/23

[@thereluctantgearhead4544]

1.2K on 6/28/23

[@thereluctantgearhead4544]

1.3K on 7/18/23

[@thereluctantgearhead4544]

1.4K on 8/9/23

[@thereluctantgearhead4544]

1.7K on 10/9/23

[@fluxcapacitor9867]

Sr year a pal had his dads 55 post with tall deck 427 / Muncie & dual stats , did a hellacious burnout in front superintendents office & bossman ran out screaming with paddle waving in air …..1989

[@thereluctantgearhead4544]

Haha! Those were the days. Drove drag cars to high school myself, often had to give demonstrations of the power on tap. Always getting into trouble back then. Being young, having a large audience of my peers from high school watching and a high powered 67 Firebird drag car on the street, it was the perfect storm. I ran over a grandma's brand new car doing a burn out in town once. Had to buy her car. I was 15yrs old in a hotrod 69 Chevy stepside with 540hp 327 under the hood, 4/spd & 4-56 gear. Took over a decade to pay for that fuck up. Live and ya learn I guess. Wish I still had all the cars I've destroyed.

[@thereluctantgearhead4544]

All of us auto shop guys had hotrods back in the 80s, at the end of the school day everyone of us would fire the shit out of our rides leaving school. It was like a daily ritual. We would even compete for distance and smoke and darkness of the rubber left. Shit became a contest. We had some pretty bad rides at our schools back in the 80s. Alot of musclecars since they were mostly just used cars at that point and cheap. Buddy bought a 69 Impala with a 427ci in it for about $500 bucks back in the mid 80s. Musclecars were cheap back them.

[@pauldhiman8369]

Heavy duty buddy

[@thereluctantgearhead4544]

Pretty stout unit to build.

[@charlotteatwater6957]

If you bore it out all the way out what cubi inch would it be

[@thereluctantgearhead4544]

Could bore it .125 over to 4.375 bore. Also could take a 4.500 stroke crank with some grinding.

[@stevenbauer2205]

Ever had any experience putting a 4.375 stroke in one? I know it can be done but I worry a little bit about hitting oil when clearancing the block next to the main oil galley.

[@thereluctantgearhead4544]

Yep, you can get a 4.500 in there with a whole lot of grinding and stroker clearanced I beam rods with capscrews. Best to hard blok to the bottom of the water pump holes at that point.

[@thereluctantgearhead4544]

I thought about going with the 4.375 stroke on this build, but decided to just keep it simple and still make a shitload of power. I'm gonna turn this unit 8000+rpm, so a 4.310 bore x 3.76 stroke combo should work well for that. Should make 725-750hp NA@ 439 cubes. Been a while since I built a short stroke high RPM bigblock.

[@thereluctantgearhead4544]

Definitely gotta be careful grinding on the side with the oil journal tho. But there is some material there that can be removed without worry. Take the bare minimum required for sure.

[@stevenbauer2205]

@@thereluctantgearhead4544 appreciate your response.

[@Alessandro-o9n]

Just a Q could you go with a bigger piston 11.5 and keep it pump gas

[@thereluctantgearhead4544]

Yep, gonna need a big cam tho to bleed it off. Aluminum heads more forgiving with high compression on pump gas.

[@thereluctantgearhead4544]

I'm setting this one up at 13.2-1 compression. Huge BULLET/Ultradyne solid roller and 315 BPE heads. Bowtie singleplane intake. Gonna run it on E85.

[@richardanthony3788]

are the crankshafts and rods the same in a 427TD and 366TD?

[@thereluctantgearhead4544]

Yep, same forged crank and thumb rods, Just the bore is different. People have bored the early 366 blocks to a standard bore 396 piston and use a 6.535 rod length.

[@9thgatedim273]

Question big guy I have my hands on a 92 427 tall deck do u think it would clear a bel air stock hood

[@thereluctantgearhead4544]

What year Bel Air ya have?

[@thereluctantgearhead4544]

The thing about these tall decks is all the intakes made to bolt on a tall deck Chevy are big singleplane intakes that are pretty tall. Plus the engine is almost a half of a inch taller than a pass car type bigblock. A guy could run a dual plane intake with intake adaptors and get it under most hoods, but then ya gotta get a distributor with a slip collar to get it in the block at the right height. Those adaptors cost damn near what a good used intake cost. And the distributor is expensive too. Be worth looking into a 4 inch cowl hood. Then ya have plenty of room for a badass intake that bolts right on. Price of the adapters and distributor would probably pay for a hood.

[@Rickysuave97]

Thanks for the information

[@dakotatelles3483]

Whats the stocks on a tall desk 427

[@thereluctantgearhead4544]

10.20 deck height.

[@Alessandro-o9n]

Cool video sir

[@thereluctantgearhead4544]

Thanks man. These industrial bigblocks make a great platform to build some serious power.

[@Alessandro-o9n]

Any more information or tips on them would be greatly appreciated And I would like to see the build up Of your motor and channel ty

[@thereluctantgearhead4544]

@@Alessandro-o9n I have a couple older videos talking about how to build them. I'm going with 6.535 long H-beams and ICON forged .060 over pistons for a 9.8 deck 427 & the stock forged crank. Get it all balanced together and with the cam & heads I'm running, it should pull to 8000rpm. Gotta have .400 long pushrods, I'm going with MANTON 7/16 units. Should make 700-750hp NA. Going with a BG 1150 Dominator that flows 1275cfm.

[@thereluctantgearhead4544]

@@Alessandro-o9n Also have a couple older videos about the BPE heads and the BULLET/Ultradyne cam going in it.

[@thereluctantgearhead4544]

@@Alessandro-o9n I'm using a 276/284@.050, 714/714 lift, 106 lobe separation solid roller in this engine.