Motor Mount Perches?

[Jack15T]

Hi Folks, I have been trying to replace the Motor Mount Perches in my 1971 Chevy K20 Pickup. The VIN number states the truck came with a V8. Some previous owner stuffed a 454 in it, using the what I think is the original Crossmember and Perches which should have been for a Chevy 350. The 454 is hitting the firewall in two places. I want to move it forward but I cant find replacement perches. Mine are badly worn. Does anybody recognize these? One picture is the crossmember and the other picture is the Perch that came out of the Truck and the other Perch is what LMC sent me for a Small Block V8. If anybody can ID my Crossmember and Engine Perches I would greatly appreciate it. Cheers, Jack