i need some help with my 72 dodge demon

well tranny and motor is gonna be my last steps i am getting ready to send it off to soda blast in a week or so they are running bout 5 weeks behind so i have been waiting i am going to build a rotissarie stand here shortly i want to get paint and body done first then i am going to do motor stuff so i am getting suggestions right now it was a 3 speed on floor so i am going to stay with a stick i believe i have a 383 with an automatic in the barn was gonna put in it but i am having second thoughts money is not really a big problem not that i am rich but i do well what cars will interchange in parts like rearend