Okay, so the regulators should fit in any year door without issues? The '70 is the "different" one than all the others?
The door pictured is an updated version, came out mid year of 71, not sure exactly when. Early 71's had 70 style doors until the new ones were introduced. Regulators made for the pictured door will fit the early doors, but--- the 70 and early 71's regulators will only fit the later doors IF, the extra section of gear teeth are cut off. The early style will not roll up and down properly, but like said, they will work if the section of the gear is trimmed down.
Found this out when I sold a regulator to a member here. He was looking for one for his 71 and I had one from a 71. Mine was an early one, his was a later one. He was able to trim it down and it worked fine. He tried to find a later one versus cutting up the harder one to find, but no takers. I even told him I would take it back, but he was fine with it and trimmed it and works perfect. Hope this helps some.