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You couldn't actually increase the lift just with rocker arms could you? Second, my '64 Motors Manual and a yellowed note in my toolbox tells me the valve lash on my Mileage Maker Six should be .19, while a post a couple of weeks ago state .25. I actually put a car model 223 in her this time, is there a difference in gap between the truck and car?
yes you can make your cam seem bigger by adding a higher ratio rocker arm, small block guys like to swith from 1.6 to 1.7. And I do not see a reason to have diffrent valve lash but if you have hydrolic cam the lash sould be zero.