Vacuum advance question
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Vacuum advance question
I just got a newer vacuum advance from a freind who had spare parts. So i put it on. I have a 302 and I'm pretty sure the part came off of a big block. I was wondering could the wrong vacuum advance cause my engine to backfire by not advancing it right. The diaframe on the old one is a good bit smaller than the new one. I figured this because it only backfires in gear whenever vacuum changes. So should i go ahead and get the right part or do what?
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