Intake gaskets for sure needed changed. Like I said before I bought these heads used and damaged for 350.00 around 2007. I ported them around two years later and they have been on three different engines and several rebuilds. Valve guides have to be worn by now but hopefully I can stretch this out till I finish my good set of heads. But I have a couple customers to finish first before I touch those heads again. Had my first contact for some LS work today but I told him October at the earliest.