Has anyone here installed a power windows kit?

looks pretty easy was wondering how smooth it was. I already have power locks and a nice stereo system. speakers are only in cab currently since its my service vehicle.

also looking to add A/C, is this an easy install ? have a friend selling his ford pickup has a big 6 with ac was thinking about snagging it for the ac then id have a flatbed for hauling trash. hes only asking 1200 figured it was reasonable since vintage air is kinda pricey