This may sound crazy but I'm getting excessive rocker arm noise with the valve covers on, when they're off there is no noise. Today I adjusted the valves and with the valve covers off there was no unusual or excessive noise. It's as if the valve covers are amplifying the normal sound of the valve train. It's a 389 with '69 400 cast iron heads and stamped steel rocker arms. I bought reproduction chrome valve covers for a '65 389, they do not have baffles. Would valve covers with baffles be quieter? Could the stock rockers be contacting the valve covers? Does anyone where I can buy valve covers with baffles? I've already searched several web site. I'd like to know if anyone else has had this problem and how is was resolved. Thanks!