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Re: 63 C10 Won't Start!
The heat riser sticking wont cause a vacuum leak. You will find it on the driver side just under the carb on the exhaust manifold. See if its stuck, should move freely. If not, you should be able to tap it free. It redirects exhaust through the manifold to heat up the engine faster, but it wont cause the problems your having. PCV valve, vacuum lines and intake/exhaust gasket, and vacuum advance should be your only vacuum sources. Unless you have power brakes or a vacuum guage. Im still inclined to think its a fuel issue. Check for cracks on the carb bowls....I have had several that have cracked over the years as they are made from pot metal. How was the engine runninng when it ran? Smooth, rough...etc?
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