Adding extra lift onto a 6 inch lift kit

[TechnoTucker]

Sorry if I misplaced the topic I am new to the site and wasn't sure where to put this question. I have a 6 inch rough country lift kit for silverado Z71 2005 5.3L 1500. I wanna add a couple more inches for just a bit more height and a little better clearence so my 35s dont rub when im out bouncing around mudding. Id like to do it cheep but I need to do it right. I love my truck and need it for years to come. Would cranking the torsion bars up a bit and adding a leaf in the back do the job for me? I dont wanna start having stuff wear and need replaced up front so im really unsure of what to do. Any help is appreciated!