Early or late 80s? Only difference is the center hump is welded in the late 80s.
You can also open your search up to include C30 with a 4-speed. Identical cab to the K30 other than 2wd VIN. The location for the 4x4 shifter just needs to be cut out on the late 80s.
I have a rust free, 1982 C30 cab i could let go but it doesn't have a title.