My mechanic is finishing up my 383 project and ran into a problem. The Roller Rockers were properly adjusted as of 2 days ago. We tightened down the rockers by hand and then wrenched them a quarter turn. The car ran fine right after the adjustment. But after installing a slave cylinder the motor isnt running right. It has already had a computer tune. My question is are my valves some how damaged? Or were the rockers not properly adjusted? Its been a long grueling process. Any advice will help! Thanks guys