Don't have a 6 at present; but have chokes on both carbs on my V-8. Works great, and will start (and run) in any temperature from -20 to 110. It is my shop truck, and sees winter driving.
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