Don't go with more than 1" for a body lift. A 1" can cause its own minor shifting problems with the transmission and transfer case. A 2" or 3" body lift causes way more problems, especially with both shifters and the fuel lines.
When talking body lifts, I'd never go with anything taller than 1" unless it was due to some major beneficial upgrade like to a tummy tuck or Atlas II transfer case that needed more space and was worth all the extra work and problems caused by a 2" body lift. There's not a reason in the world I would ever go with or recommend a 3" body lift.