I have a friend with a '57 4 dr ht. Body is all stock. We just did aftermarket p/b, p/s & a/c. Now he wants power windows at all 4 hardtop windows. I know stuff is available for the fronts but what about the rears? Seems we have to go with a "universal" kit of some kind for the rears. So the question is, have any of you done this?? Is it a do able thing for the rears??