Pull the heads off and them ported and polished, then add a set of VT cams and upgraded springs. You may just need to swap them for a set of Fox Lake, or other companies that port heads. Or you could look at NO2 kits. You can get most of the leading brand kits for under 1k with all the extras. No matter what you do save some of the cash for a custum dyno tune at a reputable shop.
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