Hm. Good info. age of airframe is also a factor for the feasibility of the project.
And With growing chinese influence and fear of espionage in Pakistan i wonder if USA will supply Taiwan equivalent upgrades to Paki.
Maybe downgrade it by 25%>
So paki have block15 at most.. how much does it cost to convert block 15 into Viper ?
I guess block 15 would be too old to convert.
Would buying newly printed J-10c be more economical?