i will check this week, i never measured beam length or track width. but again simple math can loosely figure it out. I would guess 1/16's of an inch would be the ball park, given the beams don't sit flat at ride height and they or only a few degrees up from flat at bump. you'll see the most change from flat to drop probably.
Got a lot of work done over Christmas break. Lower link tabs cut/ built. Lower links started. Rear end somewhat mocked under the bronco. Interior apart and started cab cage. Hard to take decent pics in my one car garage.
It’s my understanding that a Ford 1ton shaft will bolt up to your flange no problem. And I believe the 1 Ton still has a double cardon at the tcase. Or have your driveshaft shop make you one using ford parts.