Sorry, I don't have any pics but I can give you a fairly detailed description of how the exhaust is laid out on my 91 940 SE w/ 5.0 + T5. I'm running Heddman Headers, from the collector the exhaust runs parallel to the block in between the block and the frame rails (it's a TIGHT fit), and continue running parallel until the tailshaft of the transmission. The pipe on the driver's side makes a 90 degree turn toward the passenger side exhaust, and runs underneath the tailshaft of the transmission. It meets up with the passenger side exhaust, does another 90 degree turn, and then the two pipes run into a y-pipe on the passenger side of the car. From there, a single pipe does the over-the-wheel bend, and it dumps into a generic magnaflow muffler of some type, and exists straight out on the passenger side. It's certainly functional, sounds great (without being loud), and I've never had an issue with ground clearance.
I wanted to do a true dual-exhaust setup on the car, but my safety conservatism won out. Running the length of the driver's side of the car (right where I would run the exhaust) are the fuel lines from the fuel pump up to the fuel rail. My concern was a situation where I run over something that ruptures the fuel line, and then I've got raw fuel being pumped directly onto a hot exhaust pipe.
Your Bertone may be set up differently (is it a 780, or a 260?).