So on my little San Fransisco misadventure, I cut a hole in my car. It's been that way for a week, and I decided today to do something about it.
On the return from San Fran, at a random gas station as I was about to turn over the wheel to my wife and get some much needed sleep in the passenger sleep, I cut a hole in the airdam right in front of the radiator, so she wouldn't have to wake me up for any power-loss or overheating issues.
So, a few days ago I stopped in the auto parts store and grabbed a 12' "Manual Choke Cable"
Step 1. Find a place to mount the choke cable knob on the dashboard. Lucky me, I have about 1000 unused dummy switch covers in my dash.
Now route the choke cable under the dash to the nearest pre-existing (if at all possible) grommet in the firewall.
Route the cable through the engine bay, around the radiator, to the airdam. Rig up a few other peices with whatever plastic scraps and spare hardware you have laying around.
Test that it opens and closes to your satisfaction, and enjoy the peace of mind knowing that your car will be much harder to overheat.