78 3/4 Ton GMC

[78GMCgrunt]

Alrighty, I own a 2wd 78 3/4 ton GMC. I need to know what the diff. between my suspension is of that of a 1/2 ton. I want to raise it a lil bit, and I've noticed that there are some 2" suspension lifts out there but they are for 1/2 ton only. I've been told from www.73-87chevytrucks.com that my front end is the same as a 1/2 ton just w/ 8lug axles. What would be the diff. for the rear end? If I have to I will go with a 3" body lift. Does anybody know what tire size I could run w/ either a 2" suspension or a 3" body lift on my 2wd? I would love to run some 33". My truck wont go offroading, just on normal wooded trails and as my daily driver, I like the look of a liftled truck as well...so please no flaming for wanting to lift a 2wd. Any info will be greatly appreciated!
Thanks
-Cody