like to do

Nick there seems to be a mixing of cylinder heads in some of these posts as the Chi 3v heads are mentioned which have raised intake and exhaust ports - not strip dominator or possible std. header compatible.the Chi 4v 228 heads have a std. 68cc chamber but can be ordered with a cnc profiled 4v chamber (74 cc's) shape very similar to the closed chamber heads. go to Chi's website and all the info is there on this head configuration.