What are you going to use it for? It makes a difference. Just for looks, get a 3" body lift and they should fit, with minor fender trimming (33's). If you're actually going to use it, a 4" suspension lift would work better. These aren't too expensive, under 350 bucks, but make sure it's a good one, steering correction, shocks, ect. Check out www.4wheelparts.com
I had an 88 K-5 Blazer, and I did a 3" add a leaf in front, and a 3" blocks in the rear. I plowed with it for 3 seasons that way, and I was running 33 no problem.
The a suspension lift in many ways is alot easier to install that a body lift.