I'm going to put this one in the catagory of "Sometimes the obvious reason is the correct one."
Question, how did I end up with 6 rear window regulators, and one front window regulators? I should only have 4 rear window, and 4 front window, thanks to frankencruiser......
Question, what is the main difference between the 73 FJ55 (moviestar) and 74 FJ55 (frankencruiser)?
Answer is......Vent Window in the front door.
Why is this important? Because when Toyota eliminated the front vent window, they had to switch to the scissor style window regulator. Vent window doors used the single arm window regulator which is, you may have guessed by now, NEARLY IDENTICAL TO THE REAR WINDOW REGULATOR!