Adding the power windows and such will not be very difficult if you can do the work yourself. However, cost will vary too much to tell you how much. The easiest way to change over to all this is to find new doors as all the wiring harnesses will be in place. Adding or changing batteries will not be necessary.
Painting the doors and some minor wiring will be in order most likely though.
Gerald Wheelus
Edgewood Auto Parts #253
Edgewood, Texas