Heads (061’s) for 1967

From George Hanks, who has worked with these heads: “The #061, used on grocery-getter 400s in 1967… I’m convinced this head was the prototype for the later production open-chamber heads… While the 061 still has the A.I.R. bosses in the exhaust ports, the chamber is the most open of any production head. There is almost no ridge across the chamber… and the spark-plug hole is located in the highest possible portion of the chamber. The rear or squish wall is laid back to a 60-degree angle, producing a true polyspherical chamber with minimal squish area. These heads have been ignored for years, primarily because they didn’t fit any NHRA performance engines and had pressed-in rocker studs… but with some porting and screw-in studs, this head will knock your socks off. It doesn’t flow any better than any other D-port head, but the conversion of fuel to cylinder pressure is just as good as the RA-IV heads.”