Se7enty5

Hi all. Brand new to the site but have some questions. I have a 72 Cutlass S that I bought with the motor out. It came with a 1972 455. We are in the process of installing engine. The engine is in but the trans cross member will not line up to bolt on. We noticed the frame pads seem to be chevy small block (4 Bolt). I'm not sure if the motor mounts are BB or SB as I can't find the part numbers and they seem to be cracked anyway. Can anyone give me some insight on what to do?
I'm thinking I need the BB 3 bolt pads for the frame mounted in the correct holes and BB motor mounts. Attached are some photos of my setup.
Thanks.

joe_padavano

Welcome. Those are definitely not Oldsmobile frame mounts, so they have to go. The BBO/SBO distinction on mounts is misleading, as all Olds V8 blocks from 1964-1990 have the same motor mount bolt locations. The issue is that the rubber motor mounts need to match the frame mounts. Do that and it doesn't matter which type you use. Since you have to get frame mounts anyway, the 1969-72 "BBO" mounts and matching motor mounts are probably your best choice. These are widely available as repros. Get Anchor 2328 motor mounts (or equivalent) to match these frame mounts. See this thread for more info. Good luck.

Se7enty5

Thanks so much for the info Joe!!