Here's an estimated layout from measuring the new sills I installed on my 46 shortbed:
Dimensions to each punched hole, measured from the front of the bed, 76-7/8” long strips:
½”, 2-3/4”, 26-1/2”, 53-1/4”, 72-5/8”, 76-3/8”
End holes are ½” from each end. The 26-1/2” measurement is to a floating sill and is therefore approximate. All other dimensions are +/- ¼”, because these measurements are with new cross sills in-place and there can be a slight position adjustment.
