Page seven this thread shows where to drill, and where not to as well
The measurements are good but consider it a guide for a dry run. The lower sides are real easy, the moldings position 4/10" below the body line. Side moldings take a hole on each end with 3M tape clips in-between, though the upper fender moldings take a hole for each clip.
Depends on the clips you get too.
http://67-72chevytrucks.com/vboard/s...=730025&page=7