Report Carburetors used on 1971 Avantis in 1965-83 Avanti Posted July 28, 2015 I've got a CCC quadrajet. I had it rebuilt by a knowledgeable local guy last year and absolutely love it. It performs greats and I get 20 mpg. They aren't junk if you know how to massage them. In general the quadrajet is a wonderful carb that gets a bad rep because of its complexity and that you really have to know them inside out to get the best out of them. The 'Computer Command Control' system, with its fussy electronic Quadra-Jet carb, is bad news. Don't throw away money trying to fix a system that was unreliable when new. If you're having issues with the 'CCC', replace the carb with a pre-electronic Quadra-Jet, or an Edelbrock,..along with an earlier Chevy V8 distributor with its advance controlled by engine vacuum. You will never look back!