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I am currently running a com9000 that just so happen I bought at a supershops years ago. I mainly ran it before for clearance with a tunnel ram. A properly modified HEI with vacuum advance is a great choice for a street motor, parts are easy to get and they are easy to rebuild and tweak, hard part is changing advance to fit the engine, not a big deal unless you have a high hp engine usually. Personnaly I like no vacuum advance and no vacuum hose. Also I get a know advance all the time.
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