Matt over at GMMG said he could send the heads off with some of his for porting since he does several sets on a regular basis. I didn't ask who he was using but he mentioned that he sends them to Michigan. Please bare with my ignorance, could you explain more about the speed density programming as opposed to using a maf. I was browsing around over at ls1tech and saw the name of a place that ports the stock LS2 intake and wonder if that is worth enough gain for the trouble, I think they were called port works. Leaving town for a few days this afternoon so replys to anyone will be after I return. It's family vacation and I leave the computers and everything home and just hang out with the wife and kids.