I always heard the super comps work,but still not sure w/manual.The z-bar can be played with.The ball mounts in various spots according to application and the bracket on the rame can be moved.The very first headers I put on a`71 K/20 I ran into problems with clutch linkage.I cut relocated the arm(s) on the z-bar and it worked like a charm.BUT!! There should be headers made that you can bolt onto manual 4wds...period.and,header companies should have them listed as such to make life easier for "ALL".Some make a header that will fit,but they couldn`t tell you
or they guess and just say,"yes".or what we pay for coated headers we shouldn`t need to be sliding them in and out trying to see if they`ll fit.I`d like to think some of my money went to R&D and not just a bunch of pipe bent and welded together.