I agree with Dave on the heat. Hot water is better than nothing, but exhaust gas is hotter and faster than coolant, and a leak is less of a potential disaster, as long as the exhaust leak doesn't get into the passenger compartment.
Dave,
I looked at your Webshots. Everyting Looks Great. Thanks for sharing. I found the image of the heat on the single carb manifold with Fentons. That should be the way to add heat if you are using headers. Is there a need for the thermostatic spring and bypass that the stock manifold uses? Probably not, as there cannot be much, if any, loss with hot gas takeoffs. Is there any reasonable way to provide positive flow if one wanted faster warmup in northern states?
