I have a buddy that's currently in the process of building a '31 Model A pick up. He's run out of money and made a very strange decision for the motor. He wants to put a Ford Focus 4-banger in it (which he has lying around). I've tried to convince him that it would be taboo to do it. The truck is pretty traditional over all, but the engine idea will kill it in my opinion. His decision is only a temporary one as he plans to eventually drop a '65 cadillac motor in it that he has to rebuild completely. Strange? What do you guys think? Has anyone here built something similar with a modern engine in it?