Quote:
Originally Posted by BritishGreen68
Have these been modded at all for higher lift cams? I think I read that OEM Vortec heads can't handle lift above the high 400's without a small amount of machining and nicer springs...?
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Not above .480 according to the general. I have used some cams a bit higher than that with no issues.
Id make you an offer on these but you wouldnt like it , so free bump.