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i bought some nice vortec heads but they don't have screw in studs,the cam i'm going running has 490 lift,should this be a concern? do i have to spend the $ and send these things to the machine shop again???
 

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ive got a 480 lift cam and stock heads, no probs yet, i rev the hell out of it! ill let you know when they pull out!!..
 

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I've been running my vortecs with the OEM studs for a couple of years now with .510 lift cam and no problems to speak of yet.

Maybe if spring pressure or cam intensity was higher, it'd be necessary, but for mild cams, I think it'd be overkill.
 
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