Jimw,
I would be OK with the light shade of white. Does the engine at highway speeds have any stumble or bumble to it?
Hank,
Checking the plugs while only in the driveway @ correct rpm is not using the carb circuits the same way as a load on the road. I think on the road is more correct way to do it. Agree on the WBO2.
Next get the PV to open when you need it.
Can you tell the secondaries are opening at a certain RPM?
The work you are doing will help many other people tune a 390 for great street use, keep it up. Tom
