Pictured here is an original 1930 advertising brochure for the Riley Model "B", "C", and "D" Valve-in-Head cylinder heads for Model A Fords.
The Riley two port cylinder heads described in this advertising are overhead intake valve "F Head" configurations. Also included are the original installation instructions for the
Follow this link to see the September 1931 Ford Dealer & Service Field magazine article about George Riley's Secrets of Speed and his tips how to build a 100 mile per hour Model A Ford Speedster.