904 rebuild

Hi guys I'm wanting to rebuild my 904 in my 72 dart swinger. Building a 360 right now for it it is a 318 car transmission is in good shape. Talked to one trans shop and he talked like there could be a difference between a year or two earlier version of the 904 and my 1972 904 any ideas would be appreciated. My 360 is a going to be 10:8.1 engine with a extreme energy 285hl cam roller rockers/ dougs headers Kieth black 107s rpm intake and 750dp carb aluminum heads hoping for 450hp and the same tourqe. Wondering how much I should beef it up. The car is going to spend most of its time on the street being a boulevard bruiser a member here suggested a converter 3200 rpm range car has 3:91 gears probably going to go to a 8.8 Ford diff and a locker. Thanks I advance