8 3/4 B to A swap

What year Dart is it going in? People put earlier B-body axles in A-bodies without shortening them quite often. The wider axle allows them to run a wider wheel/tire with a more modern offset wheel. Thats the route I'm going.

A 1974 dart 2 door hardtop.

That might work, if I wasn't planning to run original magnums, i have a good set and cant afford to go and buy new wheels.