Vacuum advance issue

I have a mild 360 in a 1974 duster with vacuum advance issues. Trying to see if I’m doing something wrong or if it’s the vacuum advance. Idle timing is at 11 and wide open is 34 with the vacuum advance plugged. I have edelbrock carb. The one I’m hooking it to is the passenger side. As soon as I hit the throttle the timing goes crazy and starts pinging. Thanks guys