I have 2014 f150 screw 6.5 foot bed 6.2L max tow, off road package 3.73 gears. I am thinking 4-6" lift and 35" tires would 18" rims or 20" rims be better for towing and or hauling will be pulling 8000-9000 lb TT. Won't be towing far 30 minutes to loc...