Post a pic of your engine bay, I have seen some very creative solutions involving custom or notched oil tanks. What all is along the firewall, and what type of dry sump system are you actually using? If it's the stock LS3 "dry sump" out of the grand sports, that is just a scavenging pump, feeding a tank, to a stock oil pump. There are some very easy solutions for this in the engine bay, but you'll need a different tank than the off the shelf Petersen unit everyone loves to use.
A lot of people aren't aware of how simple the OEM GM ''dry sump'' system is, it's a neat design but kind of comedic simplicity when you think of how a dry sump typically works.
Most people that hide these things put it along the firewall with an oddly shaped or notched tank, or on the radiator support area, along with some other things and just build a bulkhead or cover or something.