Looks like all you need on that door is to move. The upper hinge forward a hair. But check the bushings they may be warn out.
Jigsaw is a good word to describe the bumper!I hear you. From personal experience, when I replaced that bumper, it was a real jigsaw puzzle to put back together, with multiple pieces that had to be balanced just so, to line it all up. I say if you did it in six hours, well done!
It isn't going to be any easier, and you will wind up taking it off to tighten everything and reinstalling it. The bumper ends are the most difficult part. I just finished doing this with my 1978, but I didn't have the advantage of taking it apart first. I got it back from the shop in parts.I think the next time I will loosely bolt all of the pieces together first, and then install it all on the car. I'll report back on my experience when I do.