Drive Train Upgrade Suggestions

Easiest would be any small block/904/8 3/4” rear. You could install a stock rebuild 318/340/360/Magnum and have a great cruiser. If in the future you want more power, you can build that small block to the point that you REALLY need to pay attention when driving it or you can get in trouble. Once it is a small block/904/8 3/4” it can be mild to wild.