Engine Fitment - GTR

I stumbled across a C5R setup that can be had for beers and was wondering if it will fit? This is not the block going in. Will probably use an LS2, but was hoping the C5R heads and manifold would fit. Does anyone have measurements from the engine mounts up to the inside of the body? The most critical point is the lowest...at the rear of the engine.

[builder]

That was a mystery post...from me.