Thicker head gaskets/ less compression...

Is this an iron head motor? If it is, you may actually end up increasing detonation by losing what quench you do have. At .056", there IS some quench goin on. Believe it. You should run all of the variables including the intake closing of the cam in a dynamic compression ratio calculator and make sure the DCR is below 8.5. I even like to see street engines under or right around 8:1. You need to factor in hot summer days idling in traffic with the engine getting into heat soak. I think you'd almost be better off leaving the quench and going with a different cam. It doesn't necessarily have to be "bigger". It needs to have a later intake closing event. That will have more impact than the head gaskets, IMO. But then, what do I know?

Nevermind. It just hit me you're the same guy driving everybody nuts with this same issue on FBBO. You're undercammed. Simple as that. With Eddy aluminum heads, you should be able to stand 10.7 with no problem with the right cam. A cam change will solve your problem, just like everyone over there has been telling you.