It took a while, but I just finished converting my 63 Polara 500 383 from a two to four barrel with a Carter AFB. The good news is it runs. The bad news is it's very rough when it's first started like it's missing a cylinder or two. I'm not as experienced as most of you and I'm looking for advice on where to begin diagnosing. When I first start it, the engine is missing and shakes back and forth, which I'm sure isn't good for it. Yesterday after idling for about ten minutes it gradually fixed itself and then ran real smooth while warm. Today after starting up, it's rough again. After idling for about 5 minutes, it wasn't improving so I shut it down; I don't want to cause any damage. It's about 30 degrees outside. The exhaust seems a little 'black', but I haven't run it for about 6 months up until the 20 minutes yesterday. Thanks in advance for any advice. - Jim Jim Altemose, Long Island, NY '63 Polara 500 (Max Wedge) '63 Polara 500 (383) '65 Belvedere I (Street Wedge) '71 Bronco -- [Non-text portions of this message have been removed] ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.