The slots/grooves is the throttle body gasket have nothing to do with cooling. The slots alleviate internal pressure in hot city traffic driving that would otherwise create an overrich condition.

Repeat - the slots are to relieve pressure, not aid in cooling.

http://www.thecarburetorshop.com/Ventedgaskets.htm

The questions are valid, but you do not need an auxiliary fan or a two position manifold.

Jon.

Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
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