i have a 81 pickup 5spd 4x4 all stock for the most part besides a K&N i have some 35" thorn birds but they suck big brass monkey ballz i want somr 38" tsl super swampers what gears should i use for those tirs
thanks

 

5.29 is the lowest you'll want to go with toyota axles. any more than that and you should be looking at d60s or ford 9"