383 into 70 Dart Swinger

The Dart was originally a /6, so the torsion bars are a given. The V8 k-frame is not an original install. Are the motor mounts of the "adapter type", or are they std 383 issue? I'm assuming that the sm & large blk 727 do not have the same bellhousing? I will also be going with an aftermarket shifter. (I do have a 340, however, I've decided to save it for my 340 Duster, which presently does not have a motor). I'm used to working with non-mopar street rods, and these questions usually were not an issue. Howard