My setup not the best but it works for me

welll, I'm not doing real good with this, on mine I could find door codes for everything.
I'm guessing yours is a Supercab Long Wide Bed with 155in WB, it's GVW is 6250, but it should tell you that on the door.
I'll keep looking to see if I can find codes for the F-Series

welll hek, it was first thing on the list and I went right by it.
On your door there's codes for everything, mine had a payload number somewhere though, I don't see that here on yours, it does have specs for WB, GVW, TRANS, AXLE and Springs though, if you want to know any of those, get the code off the door for them ( it's the number/letter spec under each category)