rocker arm ratio?

88mouse

New Member
Apr 18, 2007
630
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Mooresville nc
Does anybody know how to check the rocker arm ratio on a set of rockers?

A friend of mine gave me a set of harland sharps. But he didn't know what ratio they where. The are 7/16 studs. That is all I know about them. I couldn't see a part number on them anywhere.
 
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