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  1. valve spring seat pressures,ect.

    GN7 On the Dyno
    okay ive got a set of heads on a mill already built.they are performer rpm aluminum heads. heres my questions.they have 125lbs seat pressure,installed height is 1.975.open is around 310 suppose to be. coil bind around 1.160. spring diameter is 1.55. okay i need around 140-145 for my solid...
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