Re: Jumpy Timing

Tim,
"bouncing all over the place" sounds like a lot more than wear! I think it 
is more likely that the vacuum advance has either parted company with the 
points plate, or else the vacuum advance is adrift inside the cannister. The 
vacuum advance attaches to the points plate via a peg. Remove the 
distributor cap, apply vacuum to the cannister and see whether the points 
plate moves. Now see whether you can move the points plate manually. See all 
that slop?
David Lieb