I'm guessing it would depend on whose leading India at the time. If Nehru, than watching the show from the sidelines. If Indira, an intervention in Tibet? looking for a chance to snatch Diego Garcia? Who knows?
Doubt if Pakistan would be interested in anything. Their sole focus is and always has been Kashmir and they've failed consistently at it. I wonder though if seeing the US busy with the Soviets, the Indian leadership would've been more open to smashing the Pak army post-70s.