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Moore retained the original iron 461 heads but had Slover’s Porting Service tune them up with a mild pocket-porting effort. Moore used Manley Street-Flo stainless steel 2.02/1.60-inch valves to complete the job.
The Iron Butterfly

 Moore retained the original iron 461 heads but had Slover’s Porting Service tune them up with a mild pocket-porting effort. Moore used Manley Street-Flo stainless steel 2.02/1.60-inch valves to complete the job.  View Related Article

 

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