Perfect replacement for the old, multiple rebuild Carter AFB on my 1966 Plymouth Barracuda Formula S with 273CID Commando V8 engine. Screwed on straight away, started straight away, all you need is idle mixture, idle speed and quick idle adjustment. Purrs like an idle kitten (very big kitten :). Throttle response is great, very smooth, no lag when I turn it on, couldn't be better. Ready to use - hard to believe that no further configuration is required! Very similar to the old AFB (I heard it's