Is the customer actually measuring their lift height correctly? What if they add or remove a bumper, winch, etc.? What about the condition (not to mention make) of their suspension bushings? What if one or both radius arms are tweaked? How about if the caster angle is close, but the axle...
I don't think anyone can guarantee that you won't have any vibes. You need the front pinion pointing at the transfer case. In my limited experience, it seems to induce vibes if you're even a tiny bit off.
Custom caster plates or the "washer mod" allow you to dial in exactly the angle you...
1) What is your ACTUAL lift? Measured from the flare or fender to the center of the hub.
2) How are your front and rear axles aligned side to side? You front axle shifts to one side with a lift just like the rear axle does.
If I remember correctly, the front and rear panhards attach to...