Sounds comical that such a thing would have even proposed.
If anything in the 60s.. Pakistans Gen Ayub Khan was proposing similiar deal with afghan King.. to create a confederation.
Pakistan accepting shah of iran as a ruler..
Our country was created with the blood of milloons .. not to merge with Iran.
Pakistans initial officials had pro Iran tilt due to their own interests .. Many of them were married to Iranian women.
Sikandar Mizas wife was iranian nobility.
Gen Yahya Khan was a Persian speaking Qazilbash.
Gen Musa Paks COAS was a Persian speaking Hazara etc.
Iran was also the first country to recognise Pakistan.. and so on.
Apart from the major point that both countries were in the Pro Capitalism American Camp against the commie Soviets who were at their doorsteps.
What again ای ایران and his anti Pakistan butthurt.. has no limit.