Don't think that buying a core Carter and rebuilding it with a FLAPS kit will solve everything; look at item number 2 in my post above.
But if you buy the SPECIFIC one Carter recommended, it bolts on and hooks up with a minimum of issues.
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