Ron61 Hi Ron Without the numbers off the cam he could have the wrong cam shaft. The hardness of the lobes could be different. He has looked at almost everything else. I though he have solid lifters no rollers. You can run a solid lifter cam with hydrolic lifters but will damage the cam and the lifters. A friend of mine did this, thought he was smart, the motor lasted 800 miles. The cam and lifter were wornout and torn up from the miss match. A roller cam has sharper openings and closing of the valves, that is the need for roller or shubeck lifters to work with this kind of cam. I know the Rockwell is different for the different styles of cams. He has pictures in his gallery, it looks like metal filings but is hard to tell. If he pulls the cam he can check the cam bearings and take a better look at the cam wear. This kind of problem is just a pain in the $SS.
He will fix it. Hopefully soon. Rick Lake