SLPman

I have an '86 L98 with 200,000 miles on it. I'm going to rebuild it and I would like to know if I could use the LT1 block. I want to go to a roller cam and I can get a block for free. I know the LT1 uses reverse cooling but is the block the same as my L98? Can the ZZ4 heads I bought be used on it? Thanks for any info.

SPD DMN

The block is quite a bit different. The bolt patterns for the water pump are different and the coolant passage openings are different.

GRX

I wouldn't do it. Entirely a different animal. You are setting yourself up for alot of gremlins. :smash:

GlockLT4

yeah... stick with them as a set L98 block and heads or LT1 block and heads

MarkBychowski

Not to be a weasel, but since you can't use that LT1 block, I'm in the market for one if you're looking to sell it!

SLPman

Thanks for the info guys. I guess I'll stick with the L98 block