I decided to CC my head today. Even though I used a very primitive procedure, the doctors said Ill be OK (or at least as OK as I ever was)

I have heard that the Rajo 4 valve heads are the same CC or compression ratio as a stock head. But to my eye it just looked to be larger. So to ease my mind I did an old school CC test. I leveled the head, put in the spark plug and filled it as full as I could get it with water from a large syringe marked in CC measurements. The Rajo measured to be 295 CCs and then the stock model T head measured to be 315 CCs. In reality I probably have an error factor of at least 20 CCs so I guess the Rajo and Stock head are the same. I also took some pics of the Rajo intake valve compared to a stock model T intake valve.... A huge difference !!! The old girl should be able to breathe very good ...
have fun and be safe ......