I have a 1974 volvo penta aq240 (Ford 351) mated to a 270 outdrive. I found a complete '97 vp 5.0Fi (Ford 302) that was mated to an SX. Compression isn't great on my old 351(some cylinders have 200psi, some have 140psi), and I'd like to put in the newer EFI engine instead. The motor mounts...