[67ChevyRedneck]

The window and door regulators shafts are longer for '72 doors because the door panels on a '72 are much thicker than 67-71. There is also a dimple for a screw on the inside of the door right below the wing window. I think a 72 door also has some extra holes for the door panel to clip to. They will fit just fine, it just depends on what door panels you want to use.

Edit: I put 72 regulators in a 67 door so I could put 72 door panels in my truck