Hi all.

Is there any significant difference in the blocks between a 350 4-bolt main 1988 block (not sure if L-98 or LO5) and the 96-2000 L-31 4-bolt block?

Looking to make a roller cam set up stroker and wondered if they are the same block or if there are differences that would be advantageous in a stroker build.

Thanks for the help!

 

Same block.

 

Thanks!!!

 

The blocks are the same as far as the casting goes, but if you are looking at the L98/L05 block, make sure it has the finishing machine work for the roller lifters done. Lots of L05 truck engines did not use a roller cam, so GM did not do the finish machining on the roller lifter retainer stands in the lifter valley. If the 3 cast 'stands' are not machined flat on the tops and not drilled and tapped for a bolt, then that would need to be done to use a GM-style roller cam setup.

The L31 used a roller cam, so all this work will already be done on the newer block - but it can be hit or miss on the older ones, as only cars got roller cams and trucks did not, even though they used the same engine block.

 

The vast majority of the LO5 blocks still have the machining done, but it's still a good idea to check.