Dean,
Now that you have got me thinking about this, I
went and tried to find my old Weber setup manual.
I didn't find it. It's still buried somewhere deep in the storage unit. Anyway I saw that you run vacuum advance. I never did. If you run vacuum advance you cannot use the vacuum from the
manifold as it will be advanced at idle. Then when you hit throttle it retards and fall off on a flat spot.
If you have it plumbed for vacuum under the manifold then it should be OK.
You have a good ignition box and dizzy. That's not
your problem I'm sure.
Hersh
