10-4, thanks for checking. I did notice those rods also differ in coatings as does the factory rods (what I believe to be factory rods with no numbers) on my 69 Z28 shifter setup. One silver cad and others black phosphate.
On that late 69 setup with a 70 stick, that was all bolted onto a complete 66 327 L79 with it's original M21 Muncie complete out of a corvette that my father bought in about 1972. That drivetrain is in the 56 now, However I don't recall if my father bolted on that shifter at that time or if it came with it, but that all happened early 70's, and then it just sat idle. So I know the origin of the engine/trans, but the shifter is a mistery, that engine/trans had already been in another 56 chevy by 1972 before my father acquired it. We also had a 70 Z28 that was shared as a driver, my sister totaled that car and I stripped it of everything, but that happened a little later so this can't be that shifter. I haven't run across that one yet. Still digging.