The very early Bathtub intakes were setup with a small side draft idling carb in the center.There were pics on this site showing it on a engine in I believe a 50s pontiac.The bible for this kind of info is in Pete McCarthy pontiac musclecar Performance 1955-1979.They are still avail new from Petes wife on the internet.If your going to play in this old stuff you HAVE to get it.JMHO,Tom
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