Question: L88 crank id

[highimpulse]

Just pulled the oil pan off a IR block 68 build 427/435 horse block. Crank has a 7115 stamp on it and my engine builder says its a L88 crank. Can't verify that. Anyone have an opinion? And would a L71 engine have an L88 crank or should I be excited? Would be a nice find.Thanks.

 

[Hib Halverson]

Right now, I'm stuck in Fairbanks AK on a vacation trip which turned to s&%t so I'm away from all my PN and CN info but I'll bet that L71 and L88 used the same forged steel crankshaft.

 

[JohnZ]

As I recall, there were two forged 3.76" stroke BB cranks - the 7115 was nitrided, and was used in the L-71 and L-88 427's; the 6223 wasn't nitrided, and was used in solid-lifter 396/402 applications. The counterweighting was slightly different on the 6223 due to lighter pistons.