How much for 71 Thermoquad?

Again here is what the original inventor stated back in 1930 about what his design accomplishes:

US1858615A - Carburetor - Google Patents

The walls of this venturi serve as baflies to straighten out the flow; of the fuel. thereby preventing it from striking the walls of the air chamber or the conduit 8 until after it has been vaporized by additional air entering the venturis '19 and 7. I consider this an important feature of the invention, for tests have shown that when liquid fuel is per mitted to strike the outer wall of the mixing conduit, it is likely to be carried along in liquid form by the air stream in such a way that vaporization and distribution are not efficiently accomplished.
By the above arrangement, I am enabled to avoid the necessity for mixing air with the fuel in the fuel passageways and nozzles (That's Emulsion or Air Bleeding he's talking about my emphasis) which would cause the delivery of the fuel in slugs and generally inefficient operation of the carburetor, particularly at low speeds.

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Even back then they understood that emulsion design was inefficient and caused the fuel to exit the booster in slugs instead of a nice consistent mixture.

Slug flow



So the question then becomes which cylinder gets the slug of fuel and which cylinder gets the slug of air? What if you don't mix the fuel with air in a well before it leaves the nozzle so the air bubbles don't have a chance to coalesce (Join together) to form slugs or other inconsistencies in flow but keep it solid until its delivered to the air stream? Hence the superior metering of the 72 over the 71 is just a function of design. No secret squirrel **** no magazine experts just plain old science.........