Hi, I just bought a 1973 Mustang convertible. It has the 351 Cleveland 2V engine. The good news is it passed emissions easily the first time! The bad news is I have tried adjusting the carb twice now, and really haven't been able to improve things. The Carb says Motorcraft, I think it's the "climate control" model. The choke seems to be working fine, but the idle mixture screw seems to have no effect and it's running rich at idle. Also there's a solenoid idle adjustment (is that the fast idle?) as well as a more regular idle speed adjustment screw. My Chilton's manual is basically useless. It has an exploded view and that's it. I'm thinking of putting a 500cfm Edelbrock performer on it if I can use the stock manifold. I had one on my Jeep wagoneer with a 401 V8 (600 cfm version), it was easy to tune, ran great and very adjustable.

Thanks,
Chuck