I put an 8 3/4 in an 82 Cordoba which is basically the same car. I got a housing from a 68-69 Charger I believe. The pad to pad length is just slightly different but it bolted up just fine. The only thing I had to do was drill out the locating hole on the axle pad to 1 5/8 because of the isoclamp system.

A Mopar magazine did a big block swap into a Cordoba in the early to mid 90's so I think it is possible.