Chris - the automatic choke MAYBE should need adjustment every 20 years or so, not more often, and it takes less than 2 minutes to adjust! Call me! 573-392-7378 (9-4 Mon-Tues central time).

JW - the 2100s are readily available, just significantly more money than the Rochester.

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