Early Bronco rear axle width?

I need a narrow rear end, around 55 inches axle face to axle face. I can't use an off set differential.
How wide are the early Bronco rear ends? Do they have off set differentials?

Are they Ford 9", 8" or Dana?
What type of bolt patterns will I find.
What type of gear ratio should I expect to fine?
Are there many posit-track rear ends out there?

Are there tages on the rear end, or are the axle codes on a door tag?

Thank you for any guidance you can give

Tim Lynch
Comfort, Texas

58-58.5 from wheel mounting surface
All 28 spline 9 inch, some big bearing, some small bering.
most are 3.50 gears
Yes they have tags if they were a posi