Detonation on 408 Stroker

Yeah, I get 8.2 DCR using the cam you have now which is probably conservative. Take a look at this one.

COMP Cams Specialty Camshafts 20-324-4

I cannot get into the Comp site right now to get the full specs. I don't know if it's me or them. But rest assured, it will have a late enough intake valve closing event to fix your problem. I like the fact that it is a low lift cam too. Less stress on everything. It's almost like a cheater cam. Way nastier than what you have now. Maybe @yellow rose can come up with the IVC and give you the DCR numbers. I cannot get into the comp site to see those specs. I like that cam though.