Rear end is wider than a stock A-body and the spring perches on the axle will have to be moved. It can be used but you'll need more backspacing on the rear wheels than a typical A-body.
If you've got drum brakes on your '72 you'll also need a new master cylinder and proportioning valve to go with the brakes for the later spindles.
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The F-body 8 1/4 rear axles like the Volare etc have their spring perches are 44.5" center to center, so the perches will have to be moved to 43" c-c to use in an A-body with the stock spring locations.
The F-body rear axle is ~59.6" wide drum to drum, so, ~2.5" wider than a stock SBP A-body 8 3/4. Basically the same width as a 65-67 B body 8 3/4. Doable, but you'll definitely need more backspacing.