you wabnt a short truck with a tall hitch, you dont want a truck that has to use a 5 inch drop hitch, you want a truck that has to use a 0 drop hitch with the nose in the dirt with as much weight as possible hanging off the nose, most pulling sanctioning bodies if not all run 26 inch hitch height.....

 

I would put the 285's on to pull. I starting pulling with 35" mud terrain style tires...but got tired of breaking stuff and went to 285 AT's and the truck still hooks very well. you actually want to break the tires loose and spin them, you don't want MAXIMUM traction, or else your puller will be called "M T Pockets" cuz your driveline will kill itself. Go with the 285's spin them fast and get the speed up.

as for the hitch, you want the hitch to come straight out with no rise or drop to be ideal. I keep the nose down, and rear up and my hitch comes straight out from the reese hitch and sits at 26". im thinking about taking my 2" leveling kit out also to get the nose down some more.

nose down, rear up

 

heres the truck with the three sets

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For a gas truck If your not pushing monster HP then I would go with an AT type tire. Mud tires on gas truck without a lot of power means too much traction and bouncing, which means breakage. At least around here gassers BOUNCE a lot.