I am restoring a 69 Mach 1 that has the original 390 FE and 4 speed Trans (numbers match) with a 3.25 traction lok axle ratio. The engine and Trans is in pretty good shape and has turned over. The problem is like all mustangs from that era; it is completely rusted out and needs a new frame and body. I would like to keep it as original as possible; however, I would like to know what other body styles this engine could fit into, and how this will affect the value if I do change the configuration . Thanks for the opinions.