Help indentifiying my auto lock hubs on 73 K10

[hatzie]

I learned to drive on a column shift 1950's pickup truck and a 1949 Chevrolet Deluxe with the same.
IMHO the 40's & 50's shift mechanisms were more robust than the ones from the 70's. The column shift mechanism isn't that difficult to learn. It's not unreliable if it's adjusted properly with fresh shift rod bushings and it's a cool theft deterrent.