here is an old thread
http://67-72chevytrucks.com/vboard/s...d.php?t=386752
another
http://67-72chevytrucks.com/vboard/s...d.php?t=565915
my 2 cents
-rebuild or buy new hinges if yours are loose at all. if rebuilding ensure you get a pin and bushing set that fits tight, a little play at the bushing is a lot of movement at the latch end of the door. point being get that end of the door nice and tight to start with
-remove the latch on the door post so as you adjust the door the latch is not pulling the door into it's final resting place. you want the door to be adjusted to fit correctly and the latch just keeps it closed
-I usually install stuff loose enough so I can adjust a few things by hand or dead blow hammer to get a rough fit. then tighten slightly more. using some masking tape and marking heights with a pencil can help so you have an idea of where you started and which way you move stuff by how much. adjust the doors with the fenders off and get it to fit the door opening all the way around and body line at the rear.
here is a write up for these specific trucks that may help
https://www.motortrend.com/how-to/13...it-sheetmetal/