He means is the 12 deg, dist degrees (which would show 24 on the dampener) or is the "12" actually crank (dampener) degrees EDIT .340" length on the slots would give you 12 on the crank & .435" would give you 24 on the crank
Got it. I don't remember, but I'm guessing from what I'm seeing that I did 12 at the distributor.