doe someone know maximum valve lift on 10239906 or 12558060 vortec heads someone told me 480 max or retainer hits top of guide any one know this number? thank you
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doe someone know maximum valve lift on 10239906 or 12558060 vortec heads someone told me 480 max or retainer hits top of guide any one know this number? thank you
Last set I had was .460 I think but your answer is something close to that mid to upper .400 range.
Can't you run a longer valve and spring so you don't get coil bind?
Im not sure of the specifics, but we always ran 575 lift on our llm engines.
Call Mike at Wildcat Performance in Adel, Ga if you have any questions.