[Diesel_Dave]

Right now I'm thinking that the best idea would be to put put a copper coil into a short piece of straight exhaust pipe. That way it can be easily moved in and out. In the winter I need nowhere near the cooling capacity of my radiator, so a little extra cooling load isn't going to matter at all. If I'm running too hot in the summer I can just take it out. I don't think that will be the cse because this summer I ran with an upper grill block in 100 F weather and never had a problem.

This also would mean that I wouldn't have to worry about any vlaves or controls--I like that. I'm thinking some heater hose, some copper tubing, a short piece of exhasust pipe and I'd be all set.