A vs B Body manual steering box interchangeability

All manual steering boxes, with the exception of C-bodies and vans, have the same sized shafts and are interchangeable. The power steering boxes were the ones that changed in '73, the manual boxes kept the same small sector for the entire time they were used.

B-body manual steering boxes typically had the heavy duty bearings instead of bushings, so they make for a good upgrade if you know it actually came from a B-body. Most of the A-body manual boxes were bushed instead.

Steering Box Info