Re: I need Help with a buick 455 swap
I really like the Buick 455, king of torque.
You didn't say auto or stick, if auto I would recommend having your output shaft installed into a B.O.P. case, instead of messing with the adapters. You will probally have to install the Buick frame mounts to match the engine. I weld,some find ways to bolt.
It has been almost ten years since I have messed with them, but some things that come to mind are, fan offset different for Chev shroud, starter may be on the other side as well as fuel pump. I put one in a 79 Grand Prix and had clearence problems with the oil filter and crossmember.