A 97 4x4 XLT 4.6 F-150 with the offroad package. What is the payload rating and would the rating change much if standard wheel/tire setup was swapped for BFG 285'-75-16's on Python wheels??/ Thanks for any help, I have a dealer saying the stock is 3/4 and the change would make it more like a 1/2 ton!!!!!!!!!!!!!!!!!!! Is the Supercrew a 1/4 ton then???? LOL!