Post #17- Drawing from assy manual.
http://67-72chevytrucks.com/vboard/s...d.php?t=413117
Post #32 - Pictures of B-pillar nuts.
Post #52 - From a magazine.
Same info here but extra info on the factory B-pillar backside nut -
http://67-72chevytrucks.com/vboard/s...d.php?t=522706
Here is a Do it yourself thread should you want to put in a new one (prior to paint) -
http://67-72chevytrucks.com/vboard/s...d.php?t=679368