I first bought a 62 Dodge 2 door sedan with the max engine in it. Ugly car racing till I found my 64. I used same mounts off the 64 383 for 426. Later on still having those 62 mounts I decided to put a 383 Super Bee engine in my CJ5, only thing needed was those mounts and 4”x4” 1-4” angle iron bolted to frame. I used a 64 3 speed bell (borg) to mate to the T-85 Borg Warner trans, changed clutch disc to match. Only one hole was off a little so drilled and tapped that one. That CJ5 would SCOOT thru the woods and hills. Sold it to a young kid and he flipped it 8 times, tore it all to heck.