well my blocks are tapered now , my old 2" blocks werent. The new ones have made a very noticeable improvement over the old flat ones with the wheel hop issue. just wasnt sure if it'll affect the leafs or anything else for that matter.
2006 2500HD 4X4 CCSB LBZ/Allison 1000/NP263HD/9.25/AAM 11.5/3.73's
EFI LIVE CUSTOM IDAHO ROB TUNING
M/A Pumprub Upgrade kit
AMSOIL BMK27 Dual Bypass System
Magnaflow 5" Turbo Back w/ 6" DoubleWallTip / K & N Cold Air Intake
Cognito 4" NTBD w/ 3 1/2" Blocks and MOOG Pitman/IdlerArms w/ Cognito Brace Kit and Bilsteins installed by me
BFG AT TAKO's 285 70 17's on 08' Boulder H2's
EGR Disabled & Blocker Plate waiting to be installed...