Under Hood Temperature Cooling

[BVStenner]

Looking for ideas on ways to cool the under hood temperature from the headers. My cobra has a 351 Cleveland in it. It runs fine with coolant temperature around 190 when driving (even 160 on open road good speed), a little hotter when in stop and go driving. However, when I turn the engine off or let it idle for very long the under hood temperature heats up to the point it boiled the clutch fluid. I ceramic coated the headers, put in heat shields that shield the fluid master cylinders both clutch and brake, built one for the clutch slave, rerouted the clutch fluid line and placed it behind a heat shield. That seemed to solve the problem with the clutch boiling, but now I have a problem that when the temperature goes over 190, I lose my electronic gauges (tach, charge, etc.). They come back as soon as I let it cool down.

I just have the dual electric fans upfront of the radiator with a good new aluminum radiator. I was wondering if putting in a mechanical fan in would force more air past the headers and help keep them cooler. Certainly open to other ideas.