Since my motofab 1.5" touched the CV boot (LTZ, Z71, Dmax), I am going to try to do a 1" since I only have a 1 3/8" rake on one side and 1 1/2" on the other. 1/2" rake left would be good for me. Hopefully the slight difference in spacer thickness will suffice, if not, I may clearance "notch" the lower loop on the shock mount...I am running 20x9 0 offset Hostile wheels with Nitto Duras 275/60/20...