I just bought a 86' C30 (454 automatik)last week and I'm really happy about it. The truck is original but resprayed. Here in Germany we can drive as fast as we want to(on most Highways). My question now is, what is the highest traveling RPM for hours and what speed is it on the speedo(I have no tach). I want to drive through the country and dont want to loose time. Thanks for helping me!