We have 32 +14 = 46 F-16s with us and we are buying 35 MLU kits.
Although the news suggests that more MLU kits could be bought, but I haven't heard anything of it yet.
MB,
Not a single PAF F-16 will be spared. They will all receive MLUs. PAF had an option of purchasing over 50 MLU kits depending on the availability of spare F-16s. All of the ones that we fly currently will go through the upgrades.