How hard to add PW doors to a non PW truck?

[rs74]

I called about an 84 short bed 4x4 this evening and this fellow said it was a silverado without PW and PL. What would be involved in order to put doors with PW and PL's on and have it done correctly. Is there a place in the wiring harness to be able to disconnect and take the necessary wiring with the power doors and be able to plug into the 84 harness somewhere that doesn't have the power doors.