Ford Ranger rear end fit '71 Dart?

I found a 2000 ranger 8.8 that I’m trying to see if stock width 58.5 will fit my 73 duster?I only have a 318 and don’t beat on it so it will be fine just checking who has actually installed one and has the right info, and with my 8.25 with 15x8 wheels with 275/60r15 and 4.5 back spacing the tires hit springs so each side has 1.25 spacer. So it sounds like it might be a good fit at 58.5