George - check out ebay 386049368160
There are dozens of designs and sizes.
I don't even try to start a 4x40 on the workbench without one.
And your universal mis-fit is "one size doesn't fit any"!
Jon.
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"Good carburetion is fuelish hot air". 
"The most expensive carburetor is the wrong one given to you by your neighbor".
If you truly believe that "one size fits all" try walking a mile in your spouse's shoes!
Owner of The Carburetor Shop, LLC (of Missouri).
Current caretaker of the remains of Stromberg Caburetor, and custodian of the existing Carter and Kingston carburetor drawings.
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