I have a 642 with the ford engine. What can anyone tell me about that engine? I thought i heard somewhere what car had the same engine. I would like to find one to rebuild and have ready to swap out in my 642. I dont have the time to pull mine out and rebuild it, and get it back in right away. My engine right now runs ok, It has its oil leaks, carb problems. But there are bad exhaust leaks in the manifold in several places at the head. One of the cylinder has broken studs, so it will be a fight replacing with out pulling the engine to make it easier.