Studs for mounting steering box

The B-body box the same year should work fine. The difference in the 4 main aluminum manual boxes from '62 up are: 1. '62-6 have the small diameter mounting bolts, and small diameter pitman shaft, 2. the '67-72 boxes have the bigger mounting bolts, and small pitman shaft, 3. the '73-up ones have the bigger mounting bolts and large pitman shaft, and 4, the C-bodies and vans have a redesigned adjustment cap and case, and the large pitman shaft. You can swap #1 into a #2 vehicle by drilling out the mounting holes slightly. You can use the #2 boxes in a #1 car either by periodically making sure the bolts are nice and tight, or, by making some sleeves to take up the clearance. #3 and #4 will interchange, just look slightly different. The #4 box is supposed to be heavier duty, but, I haven't found that to be the case. They use the same worm gear assembly and that's usually the first part to fail. There are also both bushing and bearing sector shaft versions of #1 (common) and #2 (not common). The bearing versions are heavier duty and preferred. There are 3 different ratios used (or can be used) in these boxes.... 16:1, 20:1, and 24:1.