That document does give you a good way to move the door out as these trucks have very little movement. But one place that is often overlooked is to move it out like they did on later cars and trucks. For some reason on the AD they didn't put a bolt in the back of the hinge. I don't know when they started or stopped this but I was working on a '55 Chevy car and found that they had bolts down deep in the hinges. That's odd, the AD has holes back there but no bolts!
Autobody commonsense 101 tells us that moving the hinge PIN is what moves the door (or hood or trunk) the most. So if we were to move that PIN out an 1/8" it's going to move the door out an 1/8" too, pretty cool.
Now these trucks don't have much hinge movement so bending the hinge as in that document posted may still of course be needed, but I have found moving the hinge around usually makes it happen.
So there is where you can do it. In this photo you can see a bolt (marked in blue) at the back (front?

) of the hinge. Your truck won't have this bolt, but it will have the hole, and it will have the hole in the bracket that holds the hinge! Why they didn't put a bolt there is beyond me. I simply stuck a bolt through the holes, it was that easy. Now, come to think of it, I had the inner panel out! OH CRAP, you may need to find a way to get that nut in there. I plan on welding a piece of metal with a threaded hole in there (a "fixed" nut) but as I sit here I forget if there is a way to access that without removing that inner panel. Which of course is often removed on these trucks for rust repair as mine was. But anyway, look into how you could do it. The red dot is the hinge pin. The yellow arrow is where you can move the hinge pin in or out when you move the hinge down inside of that pocket in or out moving the door in or out.
Here is the same hinge looking up from inside the cowl side.
Maybe try this before bending the hinge, I use that as a last resort.
Brian