If you are going to rebuild it then you can install any plate you want. I would be interested in the mount if it's in decent shape and the plate if you swap it out rather than modify it.
I've got a '54 261 (high mounted pump block) that I've got rat-holed ,hope to find a nice AD pick-up that needs an engine. Don't think the wife is in the loop on this part!


BC
1960 Chevy C10 driver 261 T5 4.10 dana 44 power loc
1949 GMC 250 project in waiting
1960 C60 pasture art
Retired GM dealer tech. 1980 - 2022