Manifold Heater for Cold Climates

I run a Clifford shorty 4v intake and headers on a slant 6. When I got the car I soon discovered living on the coast and temperatures dropped below 55* on a humid day drive-ability was bad, would not idle, and drank fuel like the tank had a hole in it caused by carburetor icing.

I used some 1/2" aluminum plate cut to size that would fit under the carburetor, and cut a square hole in it. ( it looks like a carburetor open spacer) The second plate was a cover, and pancaked to the first forming a chamber. Then drilled and taped for two barbed fitting to attach heater coolant lines in series with the heater core. Bolted it to the bottom of the intake it circulates hot coolant all the time, (195 T-stat installed) and have driven the car in sub zero and mid 90s* temperatures with no problem.