There were four different Carter Updraft carb.s used on Chevrolet COE's from 41- 55.1. 1941 Carter model 489, 42-50 model 517, 51-53 model 871, and 54-551st series model 2045. 41-50 manifold carb., mount the same, 51-55 1st series carb., mount the same. The 54/55.1 Carter 2045, mounts facing forward, because the air cleaner is under the hood.
