i have ported with 3 angle valve job on my gt40 original heads and right now im running with an e303 cam but im thinking a single pattern cam is like what ive read around outdated. and i was going to go with a exhaust biased duration cam like an anderson n-21, or maybe a crower cam.. any ideas?? im looking for a tad more power down low than the e303 and a better idle but still lopey...