[Hotfingrs]

Cast gear means the gear is cast on the cam when it is made..instead of being pressed on and made of alloy at a later date. With the alloy cam gear, the dist gear has to be made of a softer metal, so that it wears and not the cam gear.....thus my saying it's easier to replace a dist gear than a cam gear. With the cast gear you can use a steel dist gear and never have to worry about changing the gears