Hi George
Good to hear from you , Sure been a while. Last I heard you were rebuilding the engine in the Sidchrome Mustang.
The heads I purchased a while ago from CHI they flowed really good out of the box so all I did was match port them to the manifold runners. They needed water outlets boring into the front and bleed lines in the rear. The cam was mapped to the flow numbers. Fererra valves fitted and the rest of the valve train is from Comp-Cams.