No way, no how. It was simply unworkable and ludicrous to include East Bengal into Pakistan in the first place.
Not only is it geographically separated by a vast distance (i.e. all of India), but there are significant - and as we saw IOTL, insurmountable - ethnic, cultural, social, and linguistic differences between West Pakistanis (Punjabis, Pathans, Sindhis, Balochis, Kashmiris, and Urdu-speaking Mohajirs) and Muslim Bengalis. They are just too different and have no significant links, other than nominally sharing the same religion, and even then the type of Islam practiced by the majority of Muslim Bengalis is vastly different to that practiced by Pakistanis.
Also, in practice, West Pakistan treated East Bengal effectively like a colony, extracting surplus and giving very little in return (see the pathetic response to the 1965 cyclone, and various floods and famines). The West Pakistani establishment viewed Bengalis as racially and culturally inferior, refused to share power with them, tried to suppress the Bangla language and culture, and excluded them from most avenues of political, economic, and military authority, even though East Bengal had near population-parity with all of West Pakistan. When the Bengali Awami League party won the Pakistani national elections - and thus the right to govern all of Pakistan - the West Pakistani establishment and Pakistani Army responded with a military coup. That's how much they viewed Bengalis as inferior colonial subjects.