I purchased a 4 bbl as part of my engine rebuild/upgrade and I am in the process of rebuilding it. The fast idle cam is cracked at the pivot point and at it's tip. It looks to me like it needs to be replaced, but I can't find any replacement parts. I've tried a local GM daler, GM parts direct, and a couple carb rebuild shops. Anyone have any other ideas on how I can get my hands on a fast idle cam for a '68 Q-jet?