Power seats require you to do some electrical work. All they really need is a "direct to battery" power lead, 2 relays , ground to the seat and you can use the factory power controls. We've done it many times in the Tahoe / Suburban twins. It looks and works like a factory install...
You'll need the harnesses out of the donor doors. They should plug into your existing fuse panel. You'll need regulators with motors, door panels with switches, door wiring harnesses, and likely the control relays from the donor truck.
Another way I've seen it done is to get just the regulators with motors, install them and wire through relays to a central left/right window switch point (like the unused area where the passenger airbag key slot is). Both windows would be controlled from the center of the dash like they are on many sports cars. It would be custom but require you to know quite a bit about wiring, relays, etc. Then surface mount a pair of tweeters where the old window crank was... BINGO! Powerful Winders.