if the motor and trans mounts are the same i don't see why it would not work. i have read that you can put magnum head on an LA engine but you have to get new push rods that are shorter and hollow. they sell kits. if your going to install an older engine minus well go with an older trany that won't blow up on you.
https://dodgeforum.com/forum/1st-gen...um-engine.html