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NO MORE GM left.. all gone.. old GM # ws 10147945.
Illustrated for your info only. Using the illustration ..its probably not hard to make up something like it too.
This is a genuine GM early model part designed to help Pontiac owners reduce the general effect of Fuel Evaporation in late 60's - mid 70's GM V8's fitted with the GM Rochester Carby.
There is also a GM insulator for a Holley is you have that from factory or aftermarket also.