Couple things make ping.

carbon'ed up combustion chamber leading to glowing red hot spots. Could be your issue, try some of the carbon remover products. 3M makes a good one for professional use.

too much timing. (12-16 initial is about right for most windsors and 32-38 total by 3000) I don't think this is your issue.

too much vacuum advance. The vac is adjustable by an allen key in the hole where the vacuum line goes. (most single and double vacuum line units) Loosen to get more advance, tighten to get less. You have to adjust intial after you diddle it.

Carb can be too lean. I suspect this is your issue. Rig up a vacuum gage into the car and run and watch. You should try and see vac level when it pings. Try adjusting the power valve to a higher number and / or 2 jet sizes larger on the primary side. Assuming it's part throttle pinging. If full throttle, go 2 jets up on the secondary also.

If you added a short duration cam and variable rate lifters you may be increasing compression too high.

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'73 std convert. 351C-2v with edelbrock 4v on performer intake &cam, Autometer A/F gauge for fun. AOD and 3.25:1 limited slip.
'68 std coup big block Resto in "pause mode"