Al, the number should be stamped, not raised. The 12R prefix is normally a raised number, and is a casting number for the body blank (not meaningful). You are looking for the word "LIST".
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
