I think it's going to be a lot of work and expense, for just a look. I have the chrome clad 20" rims and have beat the hell out of the truck, hauled heavy bed loads, like a cord of green fire wood out of the woods on non existant roads, never had a problem. Friends all told me the 20" tires would blow out, nope. Used to haul diesel motors in the bed as well, a 12L 725 hp Volvo with marine gear weighs about 3500 lbs, I'd guess the firewood around 4,000 lbs. Good old Hankook Dynapro ATM tires at 40 psi. 8 lug wheels and tires are heavier, will hurt the ride and mpgs.
Inertia Spartan + cam, Circle D 3,000 stall ,Sonnax line pressure booster, MagHytec 68RE pan,and differential cover, Vararam, JBA's with cut outs, Rancho 9000's, Helwig rear sway bar,3:92's, extra rear leaf,Line-X Bedliner,GY Armortracs, 245,000 miles To Hell and back. 14.2/96 mph NEDW