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Use some Play-Doh in the valve reliefs to make sure the valves don’t kiss the piston at the top of the cam’s travel. Even with a 600-plus lift cam, we have no problems.
351 Cleveland Roller-Cam Conversion

 Use some Play-Doh in the valve reliefs to make sure the valves don’t kiss the piston at the top of the cam’s travel. Even with a 600-plus lift cam, we have no problems.  View Related Article

 

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