Was that belltech 4" drop you ran a flip kit? And yes, if I do install a flip kit I'll revert back to original shackles. thanks for the reply!I originally ran a belltech 4" drop in my K3500 which also stated wasn't compatible with a K series, everything bolted up fine. Keep in mind if you eventually plan to do a flip kit you will have to install original front leaf spring mounts and shackles.