Putting old school 392 in a 70 duster

You'll need to fab mounts, Exh, everything. I helped my dad do this in a 67 Coronet and it was not easy, so in the smaller A engine bay its going to be tougher. Anything can be done with time and money. They weigh a lot. In my opinion, unless you want the wow factor, sell it and do a modern hemi or big block.