Re: Externally balanced engine troubles
If it's an automatic it's easy to put the flexplate on backwards, which would cause it to be wildly out of balance. Just a thought.
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1970 GMC Sierra Grande Custom Camper - Built, not Bought
1969 Pontiac 2+2 427/390 4-speed Coupe
1969 Pontiac 2+2 427/390 4-speed Convertible
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