Questions:
1. Have you drilled all 4 throttle blades, or only the primaries?

2. Why are you trying to run a PCV valve on an engine like this? You really don't want that recurculated sh!t getting sucked back into your induction system...

3. Where is your vacuum advance connected (direct manifold vacuum or a carb port that only pulls vacuum at higher RPM, but not at idle)?

4. Stick car or automatic, and what stall if an auto?