The stock carb is set up to run very very lean . . . this was Ma Mopars first attemp at trying to computer control things, but who puts the electronics on the air cleaner where it is vibration city ????. . . I had a 77 New Yorker that the computer was way wacked out, and I changed BOTH the ignition system AND Carb, back to "regular" stuff . . .worked great after that !!