I installed a power package from edelbrock on my 289 small block. I am running with kieth black domed pistons. The heads are the performer heads with ford racing roller rockers, edelbrock hydrollic cam and lifters. I have adjusted the rockers and everything sounds fine except for one cylinder. The #4 cylinder has a tick to it and when I adjust the valve it gets worse. It doesnt matter if i tighten or loosen the sound either gets into a knock ( we all know that means I have tightened to tight) or it gives you the too loose clap. I am lost. I have tried to adjust the valve 30 times or more and it still makes the noise. None of the other rockers/valves make the noise. Do you have any idea what could be casuing this? Short of pulling the heads, I have ran a compression test and all cylinders are at 155 to 158. So they are all matching within the 10% range. PLEASE HELP.