Manual steering box swap issues
This may help, cheers
62-76 A-bodies, 62-72 B-bodies, and 70-74 E-bodies all used the same manual box. Most of these boxes used bushings throughout, however, the B-body V-8 units were built for more abuse and used bearings internally instead of the bushings. All manual boxes used a small sector shaft with the exception of C-bodies and vans to 1988. The big cars and vans used a large sector, presumably for added strength. It's also assumed these boxes used bearings instead of bushings.
https://www.bigblockdart.com/threads/steering-box-info.45860/
https://www.bigblockdart.com/techpages/moognumbers.shtml