50 GMC 100,motor's tired.Parts to o/h a 228,248,etc. are well over a grand while later 235 kits are under $400.The owner's not concerned with originality-he just wants a nice Sunday driver.I'm thinking of rebuilding a pressure-oiler 235 and swapping it in.According to the Search threads,fabricating a front motor mount spacer plate and a different exhaust header pipe are the only modifications necessary.Are there any other potential problems?