Just a little tidbit...the Vauxhall VRX8...that cool sedan the pretty lady from Top Speed(or whatever the show) was driving? It's essencially a G8. But it uses/used the LS2.

just throwing that into the L76 already in the chassis thing.
That, AND, the G8 is not a Camaro. and although it uses the Zeta platform, the Camaro's rendition should be radically different (in it's own right). Zeta was built for change, and adaptability. So saying that an engine is already fitted for the G8 chassis, or the VXR8 chassis (I know I just did

) doesn't hold as much wieght as it would when regarding 'normal' cars, I think. (IMHO)