A good Fuel System Inspection and assessment is Always in order, but please consider that the 60' F body Gasoline carbs were equipped with 'Open and Vented' fuel bowls and evaporation after parking in an enclosed space you will experience evaporative gas collection in a garage after a drive.
When in Doubt Check it out, but just some smell should not demand a rebuild, base your decision to rebuild on "Condition and performance" of the component.
Again Check out the entire system, Cap to Carb,
My Point is "some"- minor smell should be expected,
Jim