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    273-4 vacuum leak

    Hello to all. I'm writing to ask advice about a (likely) vacuum leak. I have a '67 Barracuda Convertible with a recently-rebuilt 273-4 Hi-Po (not by me; a local machine shop), .030 over; Hughes did the heads (ported and "larger" SS valves). Compression is estimated at 9.2. Cam was size...
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