Howdy,

I finally got my engine parts back from the machine shop. Build will be near stock, 5.7 using the factory TPI intake, heads and ECU/PROM. Flat top 30 over hyper-u pistons, forged rods, mild cam (Comp K08-300-8), 1.5 roller tip rockers, 700r4 trans. My question is will the crank I bought work?

https://www.summitracing.com/parts/ESP-435334805700#overview

The machine shop thought I’d need a different crank or a different flex plate for this crank. Anyone know for sure, before I start measuring and assembling everything? Planning to use the factory flex plate or possibly a Rock Auto replacement.

Also, is anyone interested in me posting the build as I go along or is a stockish 5.7 build ‘meh’?



TIA,

Mark

 

If the 350 block you have is post 1985, you need a 1pc rear main seal type for sure. You certainly don't need a 900 dollar forged one for a stock build though. Was your old crank scrap? Why a new one? And the machine shop would typically know what you actually need. If you have a post 1985, stockish build this will be more in line https://www.summitracing.com/parts/esp-103523480
the flexplate you will need will also be any post 85 sbc.

 

for that much money, might as well build a 383...

 

The block is original to the car (‘88 GTA) so it’s a roller cam block with the 1 piece seal. I know I could have tried to have the original crank turned down, but I had the money and wanted the bottom end to be forged and don’t want a piece with 300k miles to fail on me.
The question is if the listed crank will work in an ‘88 roller block with a stock (style) flex plate?

thanks,
Mark

 

It will work, absolutely. It's just $600 wasted on a stockish rebuild. I'd also reuse the crank if it isn't insurmountably damaged.