With all due respect, I have never figured out why you would want to run water through an intake given ALL of the various spots it could leak and with the idea in mind that a water leak on a road trip is much more serious than an exhaust leak not to mention hoses everywhere. The hoses are really not very attractive.
What is wrong with exhaust heat? It definitely heats up more quickly - like as soon as you fire the engine up! Exhaust is the way Chevrolet and all of the manufactures originally set up these vehicles. It sure seems like the right way to me.
