The column shifter on my 67 C10 will no go all the way from Park to L1. I have gone under the truck with someone in the drivers seat and adjusted the linkage to transmission. When doing this I still don't get the full range of gears it seems to always be off 1 gear. I can either get Park and not L1, or I get L1 and not Park. Has anyone experienced this issue before, or know what might be causing it? Everything else with column and shifting seems fine. It would just be nice to be able to get this working properly.