I just bought a 69 ss 396 that now has a L88 427 in it? was looking for someone in the madison WI area with knowledge of these cars to look at it to let me know what i really have or if anyone knows of a reputable place in the area that can do It Thanks kevin

Give me a call at 608-588-4965 and I'll give you the guy that did ours.Larry

What are the casting numbers on the L88 block? Does it have GM aluminum heads and intake? Sounds like an interesting car.
Rick

where are those #s located on the block. it doesnt have aluminum heads on it but they are supposed to be the large port heads
Kevin

Just remember that there were 1st and 2nd design L88's. 1st was closed chamber and 2nd was the good one with open chamber. The open chamber heads were aluminum. I had one in a 1966 Olds Cutlass with a th400 and 4.33 posi. The car looked like Mom's grocery getter. Can you say sleeper. Dumbest thing I ever did was to sell that engine.

classic car apreasers.

The casting number is on the bellhousing flange at the back of the block. You should be able to see it looking down between the firewall and the back of the driver's side cylinder head. The casting date can be a couple different places. One is on the same bellhousing flange, but to the left of the distributor area. The other is on the side of the block near the starter,
All the L88 engines were aluminum head as far as I know. There were many other Chevy Hi-Perf engines that were iron headed. Your short block may still be an L88 though.

Rick