'66 Malibu N/SA

[Dave Muller]

Originally Posted by Mark Yacavone

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.

Yes, mufflers still on. It was warm but not really hot. I'll be double-checking some things a little later today.