8.75 rear in 71 swinger slant six car?

When I was 14 or so, my brother who was a mechanic got me a summer job working at the dealer washing new cars. I washed a brand new Dodge Aspen 4 door.. Dodge Aspen on the front... Plymouth Volare on the back. My brother wanted to buy the car.. the dealer made it into a Dodge. Oddball stuff coming out of Chrysler is the norm.