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Re: Backfiring.
It is normal for engines with a points dizzy to back fire a little through the exhaust. Nothing really wrong. Unless there Is a vacuum leak. You could try richening up the a/f a bit, but I've found an HEI seems to do the trick. My 305 V6 back fires a bit, but you can barely hear it. But doesn't seem to now that it has an HEI...least I can't hear it.
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