I put over $750 into the port and polish on mine. I had a lot of bowl work done. The guy that did my P & P told me I'd likely see 40 plus hp out of my head coupled with the cams I choose. I'm thinking about selling them possibly and getting a custom grind, something with more lift! I'd recommend the port and polish. My head flows so much air my car is bloody lean after the build. It needs fuel, I think the lude head flows 270 and with the work I had done he it flowed over 310 on the laminar flow bench. I can feel a lot stronger pull up top probably mostly cams but I'd like to think it's air!!!
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