I found this while on the F150 forum. It is the way payload rating and capabilities are calculated on Fords. Thought it to be interesting, especially for those thinking about a purchase or wondering what options impact payload, etc. It is listed by year:
Yeah, I just tried the link above but FORGOT to say where to click once you are there. Once you go there, pick the year of truck then go to the "truck payload workbook" rather than truck type:
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