1955
Carter WCFB 2317S (front & rear)
1956
Carter WCFB 2444S (front), 2445S (rear). Very early production 300Bs may have used 2317S
1957
Carter WCFB 2534S (front), 2535S (rear)
1958
Carter WCFB 2741S (front), 2742S (rear)
1959
Carter AFB 2798S (front), 2799S (rear)
1960
Carter AFB 2903S (3084S on optional 400 HP engine)
1961
1962
Carter AFB 3258S (front), 3259S (rear) (3084S on optional 405 HP engine)
1963
Carter AFB 3505S
1964
Carter AFB 3614S (3505S on optional 390 HP engine)
1965
Carter AFB 3860S (3859S manual)
Click here for AFB carb metering jet sizes and step-up rods. For carb kits, rebuilders, service, etc., look for "carbs"at this link
http://www.simplexco.com/auto/sourcelist/sources.htm