On Fri, 10 Sep 2004, John Hofstetter wrote: <snip>
If the distributor vacuum checks out OK; all other vacuum connections have been checked (and the carb is original) - I'd purchase a new carb.Jim- It sounds as though the timing might be changing, as if there is a crack in the diaphragm that turns on and off the vacuum advance. That's my first reaction. Try removing the vacuum advance hose from the distributor and plugging it, and see if the problem goes away. You may get a new problem at higher rpms (slightly less top end), but that would be my first test.John Hofstetter Ol' Saline www.goldrush.com/~hofs