Bigger Lift

[xotic auto werks]

OK. I have 6 inches of lift on my gmc right now running 35/12.5 with 4.10 gears. I want to be able to run either the 36/15.50 or 38/15.50 Mickey Thompson MTZ or ATZ. I have been looking on ebay and saw their torsion keys and rear shackles for about 2 inches of lift or a 3 inch body lift or maybe both. Which would i need to use for the 36s and would i be able to use both and clear the 38s? Thanks

[Burbman]

Ought to think about going to 4.56's also.