[MadMan]

Unobtainium, indeed.

Isn't the 'intake manifold heater' that flimsy tube that comes up off the exhaust manifold to feed the air cleaner warm air when it's cold out? I never got those. It's like, let's use air from around the exhaust manifold when it's cold as balls outside, and the engine is cold, so we warm up the air charge to better carburate the gas. Except when the engine is cold, and it's cold as balls out, the exhaust manifolds are cold too, and won't warm up appreciably until the engine has been run a few minutes, but by that time, the engine is running already and warming up so what's the point?

What I'm getting at is that I don't think it's entirely necessary. If you find a 2 pin temp switch that fits the hole and switches at the correct temp, you could just forget about the manifold heater thing.