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Sorry, dude. You will have to tell me what it is I'm supposed to listen for, as I cannot hear odd sounds with the poor sound quality. It just seems to be a cammed engine that needs tuning. Tell us what you concern is.

David
 

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Well, after I made this post I adjusted the idle mix screws a little and it sounded a little better. And judging from the way it runs it might be cammed. There is no way that engine is the stock '77 129 horse engine I've been told it is.. My dads 200 horse 289 doesn't run as well as this does. But my main concerns are that when I got it the old Holley carb had a blown power valve and it was dumping fuel into the engine so I'm afraid it might have gotten hydrauliced.
 

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I reccomend doing a lean drop on that carb if you havent already. With the video quality, I cant tell if it has a dead cylinder or if it's just the cammed engine stumbling at low RPM due to lean conditions. Hope this points you in the right direction. GL.
 
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