Look here Sean http://www.355nation.net/forum/lifting/61254-post-up-your-lift-tire-wheel-set-ups-needed-data.html and click the blue lifted chart link for the spreadsheet. :thumbup:
Edit: Your Z71 2x4 uses the same kits as a 4x4 would.
Edit: Your Z71 2x4 uses the same kits as a 4x4 would.