I have a complete set of what I believe is NOS 427 Ford SOHC or Cammer valves with SK part numbers. Intakes are SK 31299 and exhaust SK31300. Head diameters are intake 2.25" and exhaust 1.90". Over all length are Intake 5.745" and exhaust 5.669". Also they have the Ford logo on the stem. Most are legible with the logo and SK number. They also have some sort of an yellow inspection stamp. eparocz@aol.com SOLD
