I have a 1972, 442 clone just had a 1968, 455 rebuilt bored 30 over eldebrock performer intake and a 750 eldebrock carb, and had the motor dyno tested and I can not get the valves to stop rattling. Any body have any suggestions?

 

Are you talking rattling, ticking, clattering, or pinging?

- Eric

 

If it sounds like it's under the valve cover check to see if the rockers have not come loose. I have had my roller tip rockers come loose on me before.

 

x2?

 

Is it constant or only under acceleration or when going up a hill, under a load?