in tuning my new engine combo, I found that the vacuum advance can is DOA on my dizzy. I was wondering if they are interchangeable between the factory electronic ignition dizzy's (what I have) and the older points style? I'm thinking an older app might have a can with a little less total advance built in (I'd like one with ~14-15 degrees, my dead one has 17 degress, most I've found are ~22), which would suit my combo better.

also, does anyone know if the aftermarket ones from Standard or Airtex are adjustible like the factory ones?

thanks in advance