Please have a look at post #17 AND #24 of my build thread. As mentioned in #24, the dimple needs to be facing up and 'slightly' toward the center of the truck, facing away from the ball joint. I wish I could remember what 'slightly' meant. I think it was at about the 1 o'clock position, but it has been a while.
http://67-72chevytrucks.com/vboard/s...d.php?t=560841
Hope this is helpful.
Jon