You understand that the stock A12 distributor does not have a performance curve. Even the emissions distributor has a better curve. Which mean pertronix will not increase HP, but it will be more reliable than points.

Total advance is most important, and is manually adjusted by rotating the distributor. Changing the weights for additional advance will make it take even longer to get to full advance. Heavier weights or lighter springs is the way to go to improve the curve.