Finally was able to pull the valve cover off of the motor or last night, didn't like what I saw. Looks like I've got a couple of collapsed lifters. So made some phone calls this morning. The worst news came from my engine builder, he says that they took a friction additive out of the oils to not cause catalytic converter issues. This has started a near epidemic camshaft failure problems. He was saying even general motors is having troubles sourcing replacement camshafts. with a big storm looming tomorrow I guess I'll put the valve cover back on and order a cam. Not what I wanted to hear, but what my instincts were telling me all along. By by $700. Lol