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As in recommend other modifications?
If you already have headers and a catback... and getting a CAI... then i would be looking at some high ratio roller rockers... I think they are available for the alloytecs... could be wrong...
What are you trying to acheive?
Far out... wtf was i saying... must have been out of it... been too long since I've tinkered with a holdenhehe like to see him fit these to a dohc motor