Yes any CAN port and channel is fine. Note there are instructions in the help file how to set up the ECU master CAN. G4+ ECU Tuning Functions > CAN > Device Specific CAN Information>ECUMaster 8Ch EGT to CAN. The LTC dash set up instructions are on the same page.
DI9 & DI10 will need to be set to off for CAN 2 to be available.
You can load the GTR map into your Fury. The Fury features will added into the map once it is loaded into a live ECU.
One thing to be aware of is you are going to have to build an external circuit to generate the TPS signal for the Attessa ECU, the GTR plug-in ECU has this circuit built in but a wire in ECU wont. I will post a bit more detail about that when I have more time.