I have a newer set of J heads that I'm getting done and decking them 30,000's and try to pick up some cc The old heads are smog heads I made you my own gasket match a little but no porting guides and valves I'm sticking with 194's I do you have the option of going to 202s but my head guys telling me to stay with the 194's for the street and a little bit of track performance Says the 202s will only help me if I'm trying to go above 6500