After spending months doing body / paint work to my 72 door, I go to install the window and find it will not go all the way down. the the large gear on the window regulator rotates up into the door frame. I check my 70 drivers door and sure enough the opening is very different. I now have to alter the door to make my 70 guts work or install 72 and up style regulators. That or find a 70 pass door in good shape, strip and paint all over again. So just to let you know, you can install 72-74 window regulators in a 70 door . You cant install 70 window regulators into a 72-74 style door