The vibration IMO isnt an ignition issue with his 327 engine. As i stated a couple of months ago it has to be in the rotating assembly. Anytime you rebuild an older engine, new rods should be purchased. The time and money to size, magged the rods and check for straightness that money could be spent towards some good Eagle rods or Manley rods. But IMO if you have a good used Muscle car engine numbers matching, IMO i would keep as much of the original parts as i could. Just me. But if you run a street and strip engine, new components should be used.
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