I would be surprised if Jon H. (aka CarbKing) doesn't have the part. You might try sending him a PM.

If that doesn't pan out, here's the replacement for the 1A-31 at Mike's Carburetor Parts, Flange Gasket G499..

Doug


1947 2nd-Series GMC FC152 3/4-ton
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1953 Chevy Bel Air Sport Coupe Powerglide