Dakota Engine swap help !

Front what I see the big problem is that the 3.9 and 318 bolth have the motor mounts in the front of the block. So when you try to bolt the 318 in it will move the motor against the firewall and the tranny wont line up. No if you move the motor forward you run in to fan/radiator problems and need to fabricate a mount. Im wondering if I can use a magnum motor which has the mounts further back?