12s?
Keeping the stock exhaust and limiting other bolt-ons you probably will need a cam but pretty much any one (including the one's you listed) would be enough. The Cheater is a much more powerful cam than the LS6 cam running very high valve lift and so it will need serious springs and monitoring.
Steve If Patrick sees this thread, I am sure that he can persuade you the cheater route from his own personal findings.



