I have a 64 Plymouth Belvedere 2-dr HT. It was an original 383 4-speed car. It has been in Nevada since new and is pretty much rust-free. The car is now taken down to the unibody in my garage. My future plans call for buying a late-model salvage Hell Cat Challenger with a manual transmission. We have a CoPart in Vegas.
The problem is very few companies make bolt-on or plug-in parts for the '62 to '65 B-Bodies. If I am flush with cash when I get around to doing this, I will use an AlterKation K-Frame replacement, because it has motor mounts and clearance for headers. Anyway, I am looking forward to finding anyone who had done a late Hemi swap into an early B-Body.