63 Dodge Dart, now let me see;)

Good luck with the build the 63/64 engine compartment is really hostile for v8's.
I went with a flaming river u-joint, mini starter, may need to clearance the trans tunnel a little and don't go crazy with the intake manifold until you figure hood clearance. Dougs headers are literally the only option, there may be more if you are using manual steering. You may need to shorten the engine mounts to get the distributer to fit. Power steering adds even more nightmare, go manual. That brake booster may not clear either the hood or the engine. You will need a different accelerator pedal, cable type out of a later mopar.