John, Sure sounds like ignition cross-firing or ''extra-firing'' to me. Obviously the question is, what could be getting moved a little on the left turns that would cause it. Sounds like you've looked at the plug wires already. I'd check the distributor internals very carefully to see that nothing is awry there, like the wire to the points having a bare spot that's touching n(then un-touching!) the distributor housing, etc. Good luck, and tell us all what it was when you do find it. Park Waldrop Atlanta