Actually the thing is the finances needed for it, some of the CCIP upgraded F-16's have different specifications, most noticably the 2007 USAF and Air National Guard's F-16's (not every one of them but most of those) lack the V (9) radar, which increases the range compared to the V (7). For example the ones that Turkey and Greece purchased has the V (9) version, with some additional changes made in other areas of the aircraft of the Greek version.