We will be getting a '90 model Bronco for FREE, here's the catch. The E4OD is shot. It has a 351 in it, is it a roller cam motor or flat tappet? Can a C6 be swapped in in place of the E4OD or is that too much of a hassle? Will the front fenders and grill assembly from an '84 fit the '90 or will nothing line up? I really prefer the '84 front end and we have an '84 already. The body on the '90 is actually in great shape, but then again so is the body on our '84.