47 Plymouth

Thanks for the info on the 2 sites will check them out.I also will put the car on here to shake up the A bodys a bit.I do have a question.I see you have a 73 Swinger.I have an old 67 Dart GT and it is like a 273 automatic on floor.I wanna maybe put a 68 383 and a 727 in it.What would I have to change to do this switch.I am mostly a Pontiac, Chevy guy but bought this from a guy cause I like the body style.Thanks for any help on this.