I did this with many of the cabs that I've had. Even after removing the cab and setting it on a homemade stand that I could roll around the garage. Because I had to do a good deal of welding on the floorboards and replace BOTH rocker panels, I took a piece of 1/4" angle iron, measured the opening of the door area, made sure it was the same on both sides, then tack-welded the angle iron in place on the front and rear of the door openings. After being that way for more than a year (I'm a slow worker)
after getting all of the welding done, removing the angle iron, both doors hung easily, and IMHO, perfectly!
