[JASmith]

This answers some questions, for example it doesn't look like insulating the brunk from underneath would be possible, nor could you create a deeper tub by removing the spare and muffler, as there's sheet metal there. Not sure why the transmission tunnel is so huge, doesn't seem all that space efficient. Can't tell if that is the catalytic converter up front, but if so, that's screaming "steal me"! Seems like the vehicle would have benefited from a front air dam/skirt like GM was notorious for to improve fuel economy, or a thin aluminum undertray which would help aerodynamics and protect the catalytic converter from easy access.

 

[ToadVine]

What is that steel cable running across the top of the first picture?

 

[JASmith]

Part of the lift.

 

[HSC4ME]

That's purdy!

 

[Walking Black Bear]

I'm thinking the oversized transmission tunnel is for structural strength in the unibody design. Flat is weak, ridges make long spans of steel stronger. That's the only good reason I can think of because you're right - it seems a bit excessive for what is tucked up in there.

 

[Innate]

Here’s a few more from when I changed out the wheels this week…