Anawrahta
Banned
80 years too early.
I could see a close customs union similar to russian and belarus. Like the original proposal.
in this case the pakistan would need outright friendly relations with india and china in order for greater economic development. Eventually afghanistan would gradually fall under pakistan's economic and political orbit due to increased dependence on pakistan against soviet influence.
Not sure though.
https://en.wikipedia.org/wiki/Union_State