another point to put into context is the 767 will still require a large investment in facilities , although not as much as the 330. The only a/c in the KC135 class is the 757, but the 767 is a widebody so bigger. ref the mention of freighters for UPS/FED EX , both had large fleets of Airbus A310 for years before ever buying a 767. 767 needs unique containers so cant interline with all the other airbus/boeing widebodies. amazing to think of the USAF buying an obsolete airliner today , the 330 finished it in airline service on the world stage which is why boeing had to leapfrog with the 787 to get the market back. think the KC135 should have been replaced with a modernised 757 !