I'd thought of directing the intake to the back of the rad, but that would mean 10 min to get warm in the winter. The MPG improvement in te winter from the setup was dramatic, so I'd hate to lose it.
I'm leaning towards some sort of setup that uses a bimetallic from a thermostat to trigger a vacum valve that controls a butterfly opening in a second intake tube letting in cold air, and having a second way to open it off the cam that the throttle cable uses to allow it to also open anytime I push the accelerator down hard.
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