Hmmmm. I just "did" the valves about 2,000 miles ago. Doesn't mean I knew what I was doing, though.
I'm going to start with the TPS this Sunday. Arrgh! Mother's Day. OK, Saturday morning, then. Then I'm going to turn the dizzy a few degs to the left (CCW). I think the piece-of-crap tach I use for setting the timing might be off. (You know, use the 8 cyl scale and mult by two. I hate trying to read 1750 RPM on that thing anyway.) If I'm going the wrong way to fix the ping, let me know, but I'm going to wing it on the timing.