ORIGINAL: Kmot
Superheat: A fella named Brian Skinner, who now happens to be the editor of RC Car Magazine, converted a T-Maxx to four-stroke power and also built a water cooling system. He made a radiator and used an old Perfect brand metal fuel tank as the coolant reservior. He did this a few years ago. If you get a copy of RC Car magazine and get the e-mail contacts, write a letter to Brian. He goes by the nickname "Skinny" in the magazine.
Thanks for the tip, I'll see what info I can come up with on that. I figure there have probably been plenty of applications like this, but most are not likely to be publicized anywhere.