I am putting a 454 in a 70 RS that used to be a small block car. I have the correct frame brackets 3982307 and 3964886 and moroso solid 62510 motor mounts. It appears that the BBC will not be centered in the engine compartment. Is this correct or have I made a mistake. The car had a 396 in it with the small block brackets and was off center. Any thoughts from someone who has done a BBC conversion?

 

I've never heard of such a conversion. Can you put a big block in a Camaro?
https://camaroforums.com/forum/70-81-general-12/79-engine-swap-46875/
It will be easier with SBC parts than with BBC parts. Mine is not offcenter, and I'm using all SBC frame and engine mounts.