Just did power windows in my 83 Brat. I used the wiring out of an 84 coupe. I used the complete door off of the coupe and changed the glass rather than install the insides out of them and the wiring is mostly just a sub unit and you may even have the correct plugins already in the Brat. Mine did as well as the plugins for power mirrors.
how well do they work?i will need to look at my wiring since i have 4 harneses that are complete just for my brat i have 3 from brats and one off something with a rear defroster.