We have a 68 convertible bird at work that i am fixing a bunch of things. Someone put in aftermarket power windows in a non power window car. Whatever kit it is, its not very good. On the quarter windows the motor bolts to a thin metal bracket with a few spacers in between.
The bracket then bolts to the inside panel with 3 studs. the whole assembly is not very sturdy and twists a bit when moving the window up and down. The window randomly does not have full travel up and down. I have had the whole mess out of the car trying to get it to travel smoothly on the factory roller guide. Also had replaced one of the rollers because it was broken in 2.
There was also some rigging to hold the window switches in.
The passenger door window is another nightmare. The window doesn't fully travel up and there is about 3/4" gap from it being fully closed. I have had that apart and lubed all the rollers and tracks and made sure the upper stops were high enough for full travel. But to no avail.
fun stuff