Help

I want to clear 20 inch rims on a 33x12.5-35x12.5 inch tire on my Chevy Tahoe...I am planning a 3 inch body lift...I know the 33s will clear but what about the width? I really want the 20s to be on a 35 inch tire...what would I need to do to make them fit? What parts do I need and where can I get them? If a suspension lift is required for the 35s, then fuck it, I just want a body lift...if that is the case, how can I get the 12.5 inch width of the tire to clear...right now the tires are 265/75/16 which is 31.6 inches, and there seems to be a lot of room....