I remember asking at a spring shop if a 1.5 spacer kit has any negative impact on front suspension. He assured me that there is no potential for problems. GRN69CHV points out that a similar amount of lift is generated by loading the back of the truck. Again, I agree with GMC-AT that some rake is ideal from both looks and load carrying perspectives. I like to justify my modifications with some practical purpose. I never was fond of fake air-scoops on muscle cars nor do I care to make my 6cylinder people mover into something it is not. It left the factory designed to accommodate miscellaneous loads for commercial or personal uses. I do not need my truck to be always at the ready for a heavy load so, for me, looks trumps brawn!