Hello all. I have a 2008 Pontiac G8 GT currently in the shop here and am not familiar with tuning. We are swapping the 6.0 that is knocking to a LS3 376/525 crate motor from GM. I just need to know if the ECM will work (PN 12619077) and what I need to do after I get the engine in. I am planning on buying the mpvi3 but not sure where to go from there. I downloaded the software but is there files i can use to flash the ECM?