Hey everyone! I have my white 92 that I've lowered 3/5 with a Belltech kit, which included the nitro drop shocks. I also removed the overload springs when I installed the kit. I also added some Caltracs bars to the leafs to help plant power to the ground better. The truck handles extremely well after dropping that center of gravity and the Caltracs bars make a huge difference in launches. The problem I'm having is a drivetrain vibration at around 55-60 MPH. My wheels are all balanced and all my suspension components are good. I believe I have a pinion angle issue. What shims are available for different lowering heights? Who manufactures them? And where can I purchase them? Thanks for any help guys!