Detonation on 408 Stroker

Thanks for all your inputs guys, I really appreciate it.
To answer one question asked, the billet Pertronix dizzy has no vacuum advance
Based on your assessments I need to either change the heads, lower the compression ratio or what else?

First, let's get this out of the way. Are you CERTAIN the static compression is a MEASURED compression, or is that just what you are repeating? If we make a recommendation, it needs to be one that works for you and if all the info isn't correct, it't won't. So the more info you can give, the better. I think a camshaft change will do it, but we need to be SURE first. ........AND make SURE everything ELSE is working right first. Distributor, ignition....everything. The last thing we want is for you to make a big change and it not help you.