Just going to throw this out, but the issue on the frame is where the oil filter is on the 351W. It is best to make some kind of attachment to hook the plates up to. The way the mounts are on the IDI motors, the motor mounts sit right on the motor crossmember, while the gas motors (except the 300-6) have the perches mount right behind the cross member. The 302 and 351W have a big hole in the frame for the oil filter, so you have to make a plate to mount to hook up to. The driver side mount is the one that is stressed the most as well.