Thanks for all the feedback and the great math lesson Ron. Much appreciated.
mkirsch:
Yes you're correct, these are all estimated numbers from manufactures. I don't yet own the F150 or TT. I'm simply doing the math before purchasing. I'd love to put everything on the scale before purchase but that simply isn't an option. This is the best I can do.
Should I be looking to increase my payload by adding airbags to the rear suspension. I just would prefer to side on the edge of caution rather than land in some grey area.
Should I also look to change out the tires to 10 ply E rated tires