Shortend Ford 9

That rear end WIDTH should work fine for a mini tubbed/spring relocated 67-69 Dart, I can't speak to what drive shaft yoke or housing ends are on it.

I am in the processing of specing out a rear end for my Dart. To run a 15x10 wheel with 3 1/2 inch back space, I need to cut 8" from a stock A body rear end (52 5/8"). That comes up with a flange to flange width of 44 5/8".