Another timing curve question

Are you running an ignition box?

I don't think I'd use vacuum advance on manifold vacuum that is all it at 8 inches.

I would reduce the initial and see if I could get the advance to start at idle speed...IOW's get it pulling some timing.

For example, if you can get the intial down to 16 and you can get a set up where by 1000 RPM you are adding 4 degrees (crank degrees) you'll have 20 degrees there and most likely, you'll get another 2 degrees by 1500.

I'm for the vacuum advance if you can get it so it doesn't rattle open tip in (mostly because the mechanism reacts to slow to the vacuum dropping) and you bring it in late enough for the same reason.

I'd love to hear what Mattax has to say, because I could be out of the ballpark but those are my thoughts.