Re: '66 Malibu N/SA
From my experience , most of these high speed driveline vibrations are shaft related. Usually from not having a 3-4 degree balance between the two angles.
Did you say you still had the mufflers on it?
I would guess it was still almost 90 degrees at 8 pm, and ODA approaching 4000'.
Already been over 100 in the valley.
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