My daughter recently bought an 87 Firebird that has been modified. The engine has been swapped to put in a 350 with headers, Eldebrock Performer RPM manifold, and an MSD iginition system. Unfortunately it is pretty much a hack job. I need to figure out how to identify the engine. She thinks the guy told her it was a 75 Chevy 350 but I'm having trouble finding numbers of the block to identify it. Can anybody please help?