A Body BB Motor Mounts

Are those hedman B body headers ?
Yes. #78030. A remarkably easy fit given the low price... but you have to have: low-deck block, exhaust ports in stock position, manual steering, shorten the column jacket, and make dog-legs coming off the collector so the torsion bar notches line up with the exhaust pipe.
There was some interference on the passenger side with one of the scalloped "ears" on my Lakewood bellhousing, though.

No idea if they'd work in an early A-body though. Exhaust is a known issue with the tighter compartment...