[andy58-in-nh]

I’d be worried about putting that big a block into a chassis with the dimensions of the old Firebird; I already had weight-distribution issues in the GA Coupe, to the extent that I used to ride around with a couple of 80 lb. sacks of cement mix in the trunk. LOL.

[Darth Reardon]

The 455 and the 400 that was in there before I blew it up were the same big block (IIRC, the only difference was a longer stroke on the 455). Pontiac used the same big block even for some of the smaller engines where others would use a small block.

[Roccus]

I used to ride around with a couple of 80 lb. sacks of cement mix in the trunk

I thought those were factory standards.