KC-767I is powered by the GE CF6-80C2, but I understand that even after the RW at Pratica di Mare was extended, the Italian Air Force cannot operate it with max fuel for most of the year.
Quadra-national think-tank comparison of KC-767 (not the old ex-ba aircraft the MoD was offered), A330MRTT and A310MRTT with an equal task requirement at ISA / SL / zero wind showed how poor the Boeing RW performance truly was. The RW was a level 10000ft balanced field and each aircraft was required to land with an hour's average burn to tanks dry (simulating an alternate aerodrome requirement) and the reps were required to calculate the max fuel available on take-off. The first thing the US rep said was "Can we make it 12000ft?" - which was refused. As the Boeing rep told us during FSTA times "Yes, that's where we think Airbus has us beat"...
Presumably the KC-46 has uprated engines and uprated brakes if it can really operate from an 8000ft balanced field within normal certification limits? Or was 8000ft the take-off ground roll?