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.
That would be your issue then. Put initial at 10deg and see how it runs.
The marking stamped on the distributor cam stop is normally distributor advance for Prestolite and Mopar. So if it is 8 or 12 it gives 16 or 24 at the crankshaft. You double it. The CAP (Mopar emission) distributors starting in 1968 had about 15deg cam stops for 30 advance. That is why initial was a 0 to 2 Deg BTDC.
Is there a reason you think you need 20 deg initial timing?
