Denny, thanks.When I say highway speeds, I mean 50 to 55 mph on two lane roads. I'd not take the old truck on a toll road until the T5 conversion that my friend's going to help me with later this year. It sounds plausible to me that the oil return passages might be partially plugged. I've put new gaskets on the valve cover and the side pan cover and pretty much stopped the old 235's leaks. I'll take the valve cover off this next weekend and check the return holes. The oil is definately coming out of the draft tube. I don't have a tach, but I've drove old vehicles for my entire life and I listen closly to my engine. I know that I'm not winding the little guy out too much, I'll just hold up traffic and smile and wave.
