I know that on my GV that rubs stock tires in the back and front if it's thrashed enough that bottom out pad extenders will make bigger shocks work great once I lift it and probably make bigger tires bit just fine too.
Are the shock mounts on a GV not mounted to the frame like the earlier models?
the shock mounts are identical to the 1st gen ones I think. welded right on the frame.
here's a pic of the front and back suspension I took a while ago
