to the OP:
just throw you on a leveling kit with the tons of available kits on the market. people are going to say use this brand or that, use strut kit or space, lift or leave stock. they ALL have pros and cons... a leveling job should be a very inexpensive not major modification. i say pick what makes your wallet. i do not have 33s like you want but im running a 34.7x11.3 or something like that. and i have no problems with a 2" level and my factory 18x7.5" wheels. i drive my truck off road ALOt on my land, farm, and deer lease with no problems at all. i know you have 20" wheels so i will say this. blue jean has the pics to show you that they work and i have a buddy with 2010 king ranch with level. he wanted 33x12.5 mud tires for some crazy reason even though he uses the truck to carry his kids around and to the grocery store. he has rubbing issues on hard turns or turning into a drive with a hump. the only thing that rubs are his massive side lugs. the only time it has been offroad was when we tried to drive through my field.
hopefully your truck is a 4wd... if not i will shut up bc i have no experience with level and 2wd
PS i see your in benton... im up there a lot shooting sporting clays an los paloma ranch off of tall pines road. check that place out if you havent been before. will actually be shooting at our company shootout Saturday. im work in downtown shreveport.