Unhook your vac line & plug it, Now set your timing to 10 deg.
Most people don't run vac dizzys they are a waste.
Rev engine up & w/ a timming light see how much advance you are getting.
If you get more than say 32 deg you need to recurve your dizzy.
I run 14 deg & 30 total no vac dizzy on 11:1 comp & no ping at all
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