Hey guys I have a 1999 ford camper van. It was my father in laws, he lowered the camper van body onto a 1999 ford 4x4 van with a V10. My first question is how to identify if the 4x4 van frame and drive train is a E250 or E350. By the looks of the rear end I think it's a 350 but not sure. I can post pics if needed thanks