To add to this, the navigation is old school by modern standards but pretty typical for the day. TACAN, ADF, VOR/ILS, and an inertial navigation system (INS) (controlled via the AN/ASN-46 panel in the WSO's pit). The INS gives aircraft lat long, bearing and distance to 2 stored targets, aircraft ground speed, magnetic ground track and drift angle. This all integrates into the HSI and ADI (as applicable).
As for IFF, my sources show provisions and mentions of the APX-80 or APX-81 set as being installed, but as to how the system works/is integrated or if they were retained, I'm not sure.