This question is mainly for Stephen....sorry buddy...I know the workload is hell. I just bought the parts from you to upgrade my shackles from non-greaseable to greaseable. I have aftermarket (Flowtech) headers on my 79 K10 one ton. I'm sure that I'm not the only one with tight shackle bolt-to-header collecter clearance. I'm gonna have to put my bolts in from the outside and cut off everything but one thread sticking out of the nut. Why couldn't the zerk be on the threaded end?