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.
This likely or may have been built in Mexico. They were very bazaar. I saw a 77 Volare Superbee. (At least that was what they called it.) With a 360 4-barrel that was not emissions allowed in US. Thus it was fast by '77 standards. So strange was this Chrysler would not allow either Dodge or Plymouth badging. It was kinda combination of both. Of course I wanted it. But not sure if it could even be licensed in Minnesota.