I wonder if I may inquire about this baby LT. my interest is to build, please don’t judge, a 302. I have read some older post a search old information, opinions of this idea for the 302. I would still enjoy a try. A question please. Is that crank good enough for street and the nostalgic road racing for fun. I’m guessing 6 grand on tach. I have a 92 camaro with the 5spd and TBI. All that said. It looks like the crank will fit the one piece seal block (350) and rod with 5.7 pistons as well. Please no why would you, just if it can be done and thought completing a running assembly thanks guys

 

https://www.hotrod.com/features/chev...982-1659-37-1/

 

I have done one using a L99 crank and 5.94" rods. I do not know how high Ernie Neal was reving his 265 in his Super Stock Caprice but was easily singing probably 8,500.

That being said you want torque not revs. A 3.75" or 3.875" stroke crank in that same block is a far better foundation for a 6K rpm street/road race application.

 

There is nothing magical about a 4.000" bore and a 3.000" stroke. This doesn't make an engine a high RPM screamer. It's everything else bolted onto the engine that makes it a high RPM screamer.

Chevy didn't make the 67/68 MO 302 and the 69 DZ 302 because that's what the engineers were dreaming of. They did it because they HAD to do it to fit under the 305 ci engine size rule to go Trans Am racing. If it would have been up to them they would have made the 1970 LT-1 350 engine in 1967 to go Trans Am racing.

The Chevy 302 is a high RPM screamer because it has to be to make any damn power. The 1970 LT-1 is a way better engine.

I'm not against building a Chevy 302 engine for a Camaro or Firebird. Seemed to work out well for the Ford Mustang back in the day when they were battling 3rd gens on the streets of America.

A 302 TPI engine would have been better than a 305 TPI engine because of the better flowing heads with bigger valves and probably saved GM some money too. 1 block, 1 head, 1 piston, 2 rods, 2 cranks.

Oh and the 9 bolt rearend in your 89 GTA has a 3.27 gear ratio not a 3:23 gear ratio.