Denny - somewhere on this forum there is a thread discussing taking only 0.003 per heating, try the search function.

And there are still a few N.O.S. Rochester B's available, for both the 216 and the 235; but due to the "numbers matching" crowd, they are not inexpensive; and they are STILL Rochester B's.

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