TO, I had a flight in a K2 in '85 when it was still 5-man. Some of the NBC, such as the ballistics computer had been removed. The R88 Camera was also gone. The H2S appeared to be degraded compared to the bombers, and the nav rad used much higher brilliance and gain settings. The Blue Steel GPI 6, which had been retained in the FF Vulcan had been replaced with GPI 4. This was older and less accurate but actually simpler to use.
On the air bridge the norm was the short Victor and long Herc. The long Victor was an option where a crew would be on standby should the long Herd go u/s. It never did during my time in ASI.
For Air to Air RV the Tacan could give A-A ranges. I don't know if they had any RT bearing capability but that was clearly not used in hot situations.