Rich in cylinders 1&2

[Tom Howland]

Boy this whole discussion is hitting home for me. I just replaced valves and guides in my Dart Pro-1 heads. 3000 miles, 1 quart oil per tank of gas. Same wear characteristics as yours. I checked and determined the push rods were too long. Also the roller tips were wearing sideways through the rockers. The lifter centers are 1/8 inch narrower than the valve stem centers. I caught that and the roller tip wear putting it all back together. I was spending to much time adjusting the guide plates. Well, I ditched rockers, studs, and plates and went with Jessel's sportsman shaft system. I think there was a large side load from the angled pushrods that wore everything. I think. Maybe. I hope. I drove the car once last week before the rain started. Every thing sounded good. I've had a lot of problems with these heads related to the pour workmanship of the professional engine builder who is no longer in business.