Quad X ring for Thermoquad primary well seal

I have a 6139s 1972 Duster carb that swells up the X rings real quickly causing massive fuel leak into the primaries .

Please , I am desperate after three carb kits to get the correct kit or seals that will not swell up and fail .

Want to not replace this OE carb , when it is first rebuilt it runs really well

Thermoquad is my baby , but flooding is severe

Thank you sooooo much !!

Joe inTampa

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