Okay, Now you can't quote me on this but from the research I've done,,,,,the spacers or "shims" slip in between the hinge and truck. We already knew that.
What I would suggest is putting the door on and seeing how well the gaps are. Without any shims. The gaps from top of door to roof, rear of the door, and bottom to the rocker. If rocker isn't installed I personally measure the gappage between the A pillar, roof, and B pillar. On my '66 the plate that the hinge bolts bolt to slide around a bit to allow for some adjustment. Starting the bolts and lightly snugging them up finger tight still allows you to gently move the door around to adjust your gaps.
This is one site that may be of way more help than what I can give.
http://www.ecklerstrucks.com/chevy-t...1947-1972.html
I also looked up this thread and they seemed to discuss some hinge/shim issues.
http://67-72chevytrucks.com/vboard/s...d.php?t=514985
and this thread too.
http://67-72chevytrucks.com/vboard/s...d.php?t=529045
Sorry for not checking in sooner, couch got ahold of me and was turning me into a potato.
Hope this helps and good luck. Your doing not only awesome but
Killer Awesome!!!