In the moparts archives for rear axles.
Under "Axle lengths 8.75" shows 4 different lengths of housings for 62-70B's. Flange to flange.
Under "Rear axles widths" the chart shows a 55" flange to flange housing for all 62-70B's.
Soooooooooooo

72 Satellite Sebring Plus 440, 72 Dart 5.9 4-spd, 68 Valiant, 73 W200, 78 D100 sb, 78 D200, 98 DAKOTA, .
Moparmarks Parts & Restorations
Desert Mopar Metal
Grand Jct. CO
970-261-7039
http://moparmark.com/
motormangj@gmail.com