Will a LT1 crank go in a 400 Pontiac?

I have a scored crank from an LT1(so its just a regular old 350 chevy crank) that I can turn down and use...I also have a 400 pontiac block and heads in the shop with no crank...hmmm. Can I put the chevy crank in the poncho block? If I have to have the main journals ground down thats fine, but I don't know if the pontiac uses bigger mains than the chevy.
Thanks,
Cale

No, they will not interchange, lengthwise or journal size.

Agreed. Totally different engines, totally different specs.

i hadn't even thought about the length difference..oh well thanks guys
cale