72 Scamp and 440

I have the oppertunity to purchase a 1972 Scamp with /6 for 350 Bucks pretty solid car and complete. I also came across a 74 New Yorker 440 complete with 727 trans for $250. Ive read some of the post on here and know that its not easy but it can be done. Heres my question. I the money im saving on the car and motor and tranny going to be worth the savings. My other question is i have a Ford 9 inch rear with disc brakes and posi ive seen these similar cars with this rear besides a little DNC will it fit?