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Originally Posted by IROCdan330
i think heads are a big issue...not necessarily block...
i say do a compression test on at least 1 accessible cylinder just to see what kind of numbers it will show. for all you know youre running like 8:1 and you do have a smogger. or its one of those goodwrench truck engines...
i also say plug the vacuum lines and tune the carb.
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A compression test will not tell you compression ratio. It will tell you cranking cylinder pressure. It can hint at a static ratio but it's not definitively related.