B body rear axle in an A body

The good news is if you have the large bolt brakes in the front, you could basically have "square" and rotatable tires.

My friend has my old wheels which were 15x7 4.125 backspacing and they have a mile of clearance on all stock everything but the axle in the rear on a 71 Demon.

I have 275-35-18's now but with offset shackles, but it would have cleared with the axle in the stock location I would think too. My car is extremely similar to 72bluNblu for the rear axle setup.

The B-body axle is the right choice for a Duster/Demon/Dart sport. Will look better with ANY set of wheels than the OE width.