i agree. The money, time and effort it takes to find and buy a good drivetrain, take out the OHC-6, install the V8 after some modifications, etc together with the money you might get for an original unspoiled OHC-6 will probably buy you a very nice non-#-matching 400 4 speed to enjoy. With lot less effort!
çause once you take the engine out, you'll start doing the engine bay, youi'll find some other things to work on and before you know it you're in over your head, LOL!