Did you guys ever get this fixed I am having the exact same problems

Nope... what did your car dyno?

Z95m6 just went ahead and purchased a new cam with LS1 springs believing the cam and spring combo is what has been killing the power. Unfortunately it will be a while before everything is installed but well definitely let everybody know if the new cam/springs resolves the problem.... and to take a stab at comp cams for their poor quality control.