We just built a 390 for the truck and have been chasing noisy valves since the first time we started it. It has a Comp 292H flat tappet cam. The cam was broken in properly. We have tried just about every kind of pushrod we could and the noise keeps moving around, but this one is a little worse than what we've been hearing. I realize there is an oiling issue with rockers in the video, we are working that out as well. Listen closely, it's more of a knock than a tick. Much louder in person.