I purchased dual spal fans, and a fan harness kit with relays. The problem is, I cant find a place to put the temp. switch. The switch is 3/8" NPT. I have a 327 with camel hump heads and a performer RPM intake. The intake has a threaded hole in the front but it is too large for this temp. switch. Am I overlooking any possible places to put this switch into? Can I simply buy a new temp switch that is larger in diameter so I can put it in the intake ? The instructions say this switch closes at 185 and opens at 165. Thanks for your help.