Hello , I have a complete valvetrain to make power from stock heads with minor mods. I have a set of NOS 1969 GT 40 valves , double springs ,retainers and locks. Part mnumbers: Intake valve C90Z-6507-AA, Exhaust valve C90Z-6505-AA,Springs C3AZ-6513-B,retainers C90Z-6514-D, and Locks...