Manifold Heater for Cold Climates

my68barracuda said

Before getting concerned over being able to turn off the hot water to the carb base, I would install the intake and run it.
My guess is the long runners on the AS intakes will like a warm carb base to keep the fuel in suspension.
Hot water heat on an intake will max out 190 to 210 depending upon the thermostat. That is much less than the radiant heat that will be hitting the sides of the intake runners from the header flanges.

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A member from Aussiespeed just informed me to block off the third tapped hole in the manifold heater. They put it there in order to install a heat sending unit ETC. Therefore, I believe a tap into either of the two heater hoses will work out fine. I did see someone tap into the water pump hose, or a thermostat housing. But, this may not be the best option for a slant in order to make the install look good. I believe the heater hose would allow for the cleanest install.