Thanks all.
I've got a line on a 454 / SM465 in a big truck. Will likely buy the whole truck and part out the rest.
I'll possibly scavange the motor mounts from the donor. Hopefully the rear mount will work. I'm guessing I'll need a different drive shaft fabbed.
Note taken about the firewall and the distributor. I'd heard rumors of both, but nice to get a confirmation!
Thanks, and any more suggestions... Keep them coming.