[1985 CCX]

One thing I mention is that Cobras heat up fast and cool slower, I run a lower temp Thermo to avoid the higher temperatures from building. Also a good radiator and fan is key. The std Cobra pushers are fun to look at but a strong puller is key.
On the gold car I dont even have a thermostat, I find it heats just fine and thus its without restriction so it also cools faster once under way and air is traveling into front of the car.

I use on all my cars - Fluidyne