Originally Posted by
Nugget_Oz
If they had managed to get the tanker deal when it was first up for tender in the nineties (which they still might but its too late now for the 757, still hope for the 767) they may have thought of keeping the 757 going as is with some upgrade of the avionics.
Boeing did win the KC-X project with the KC-46 which is a new generation of the 767 (and is already in production). The 757 was never considered for a tanker project even in the 90s. The KC-767 was sold to Italy and a few other countries but they never bothered with a 75 based tanker airframe