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So on a build where the stock rockers would be OK, how does a guy check the ratio ?



You have to mock it up with light checker springs. Install the cam and one intake and exhaust lifter, checker springs on said cylinder. Set the it at zero lash and using a dial indicator record maximum lifts go back to your cam card or using a dial indicator measure total lobe lift at the cam. Divide the maximum valve lift by the maximum lobe lift the product is your rocker ratio. You'll have to do this for each rocker arm. Dave