Re: exhaust spatter
When I had that symptom of black water splatter on cold starts and odor of gasoline, I couldn't figure it out. I took my truck to my shade tree mechanic, who is a retired GM mechanic. He found it was a bad choke pull-off, which is the little vacuum operated thingy on the carburetor that helps the choke open. Sometimes they are called a choke break. He tested it with a Mityvac. Replaced that choke pull-off and fixed the problem.
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