Thank you for all the replies. All of you have some good points. I think I'll be going with the Passon OD because of being able to use (new) pre existing parts, and the stock shifter location (as I don't have a console to hide it). I will probably put a Keisler in my 72 Demon eventually.
Thanks again.

72 Demon 340
71 Duster 340 Resto https://board.moparts.org/ubbthreads/show...part=1&vc=1