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Re: Timing and balancer help!
I was having this issue a year or so ago. It was all fixed once I spent the time and researched how to tune my carburetor (Holley 4150). I’d suggest you start there and work your way towards the more complex issues.
When checking timing are you plugging/pinching your vacuum advance line?
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1968 GMC C2500 Long Bed Fleetside
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