I just purchased some used OEM Workshop and wiring mauals on ebay that indicate they are for 1999 F-150, F-250. I have a F-250 Super Duty 7.3 and I wondered if there is a separate manual for the F-250 Super Duty? I have yet to see one listed on ebay or anywhere else where I could compare the front covers to see if the ones I bought are different. The books I bought don't mention Super Duty anywhere that I can find so far.

 

Have you tried Helm Inc. ?