The Carter 2100s came only with the size 3 (2 15/16 c-c) throttle body; but Dr. Goodpliers (the evil twin of Mr. Goodwrench) has been known to make modifications that often do not work, and then offer their mistakes for sale.

Jon.


Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
If you truly believe "one size fits all," try walking a mile in your spouse's shoes!
The Carburetor Shop