Noticed this
I bought a new truck in 1973, a Chevy. and it had no rain gutters (new cab that year), and soon an aftermarket company offered some "stick on" rain gutters then later Chevy. offered regular screw on rain gutters which they put on the 1974 and later trucks with the same cabs. Perhaps some of the old chevy guys are working for DC now. Anyway I will be looking for some on the "after" market soon. Larry