Stock PCM's on f-bodies are programmed staticly for boost, they can not dynamically adjust. Even if they can force a constant open loop program and run 60lb high impedance injectors does not mean its properly fitted for the application.
Fasttrack better have their f-body harness ready soon! You will be able to piggy back that Gen7 onto the stock PCM to keep the factory gauges and OBDII systems.
My guess is the V2 SQ. It's whats on the LS1 Fbods and 04 Vettes. I'd be leery of any change. The Vortech kits are very thoroughly worked out for their applications. I'd just as soon let them do the math.