well my dart big chief heads have 89 or so cc heads and 2.400 intake and 1.900 ex .you could care less????? then why did you post ???if you post on a cam you should say av or @050?? or should we find out were you came from so we know???? i have had big blocks with 520 lift cams hit with no pv so do not piss on me and tell me it rain