Bill,
Your right, I have the original passenger side fender and a repo door and had just as much trouble. I can't believe how difficult it is on these 55.2's. Probably that way on all trucks!
Instead of using blocks and a jack, I would sit in the step well and lift the door on to my thigh, near the rear. That would allow me to get the bolts in. Then it was a matter of little movements, up down, in and out. Still would have been easier with a friend. None of my friends are car guys, go figure.