Recent Convert

I recently sold my 67 camaro and bought a 72 swinger. I am brand new to mopar (not counting my 04 cummins), and am feeling a little lost but i will figure it out. My car currently has a 318 and a 904 trans, and someone decided to put a ford 8 in rear end in it once upon a time. However today i bought a 400 with a 727 trans to put in it and am hoping to get some help on this site as to how to do it. Anyways see you around the message boards.