Does anybody know anything about a INDUSCO DYNA CARBURATOR unit? These are aluminum, hold a 2-bolt carb, the interior of the unit spins and mixes fuel and air and acts a little like a supercharger. These units I have are old, I would expect from the 1950's or 1960's. I have a matched pair and would like to know more information and possibly a value on the pair. Thanks for looking and trying to help!