4wd exhaust routing?

[kipps]

I'm installing a 5.3 LS, nv4500, and np241 into a 3/4-ton 4wd. I'd much rather run single exhaust, for simplicity and a more mellow exhaust note. I also want to keep the exhaust tucked as high as possible, so I'm really trying to avoid running a pipe under the transmission.

Are there any reasonable options for routing exhaust above the transmission or transfer case? I see a groove in the floor pan directly above the shift linkage of the transfer case(not installed yet), and wonder if an exhaust pipe would fit in there?

I've also seen folks installing a crossover slightly behind and above the transfer case. Is there any problem with plumbing both sides together that far back, instead of closer to the engine?

I'll be having an exhaust shop do the installation, but I need to know where it's going to run so I can plan access to the fuel filters, etc.

Any pics of a 4wd exhaust setup would be appreciated. Whether single crossover, X-pipe, H-pipe, or true duals.