Fortunately, I'm in Texas, and don't really care too much for the cold. I've just visited Ebay and it looks like it will cost me about the same for the manifold and carb set-up, as it would to rebuild the old. Since I'm not that much of a carb man, one little simple one seems like the path to take.
The one I'm looking at is aluminum, they say it's their upgrade from the copper, so maybe that will help eliminate the problem.