Need help with this ZL1 block

[GMH454]

Joe, Jim halls blocks (or at least the one in photo hanging off chains in front of the coupe )had the same two vertical reinforcemenr ribs that all ZL1s seem to have.This does not appear to have them. That of course does'nt mean this isn't one.
Would guess its an aftermarket engine except its bore size kind of dates it as a early engine.
Don't know the storey Mike but keep digging. Have you tried the Can Am guys ??

[ZL1mike]

Thanks guys-

a couple more shots of this block in various stages.

[ZL1mike]

We gave the block a light hone, really it didn't heed to be freshened but we had an intake gasket sucking some oil in and oh well new rings bearings and a new larger pan and smaller cc heads for just a little more squeeze.

[ZL1mike]

The block is clean and ready for some new parts.

[ZL1mike]

the pistons and rods

[ZL1mike]

Hopefully these heads will fit brand new Nos 077 GM heads but they have been milled down and untill we do the math I won't know for sure.

[ZL1mike]

The intake was ported and you can see by the top bolt hole it has not got alot of material around it and that is where the oil got sucked in. We used a race gasket on it but a different manufacture intake gasket will fix this problem.