Dear Don S., thanks for the lead. Will check out Fleetpride. Did a NAPA search this morning, "treadle valves". They have a few & will investigate further. Thanks again.
Dear Bill M., ohmygosh, checked out your 860(s) on photobucket. Wow! Will you stop at nothing to get a perfect truck done? You have my admiration, Sir. How many DR860's have you performed your magic on? I saw 3 or so? My 1960 truck has only two rear windows, now I want it to have 4 like yours! I shoudda waited for one... learning curve blues, I guess.
3 weeks back I brought my yellow 860 home to west Mi. from far west Kansas. There's an online classifieds out there called NexTech. That's where I saw it. Saved it from being scrapped. Bought it from the scrapper himself! Good thing he put it out there one more time. I felt fortunate to be the one who came to it's rescue. Please stay with me guys, I feel I'm gonna need help.Thanks again. Happy holidays! Charlie.