The in's and out's of swapping in a B/RB into your A body.

ok guys....I had a mild 440 in a B body that was fun in the 70's. Have wanted a 440 in a dart ever since. Picking up a 71 dart in May or June. Stripped....no powertrain...does have an 8 3/4 under a narrowed frame. stock 440 comes with. Gonna appreciate all the help I can get. I'll keep you posted. Thanx