Denny, I took the truck into a shop today to have the exhaust system replaced. I mentioned the vibrating to the shop owner and he said almost the exact same thing that you did. Amazing. Anyway, I had radials on my 59 Apache once and I loved how they rode while I was driving. But trying to turn them when I was stopped or moving slowly was really difficult. So I went back to bias ply. The tires on my truck are old so I am replacing them, though.
