Arrivals and departures are subject to change at any time so I would be prepared to change terminals since there are no less than 6 terminals at JFK. International flights usually arrive and depart from a terminal with direct access to customs and immigration. Delta uses terminals 2 & 4 and from what I can quickly find, terminal 4 is for their international flights. 1h 5m would be a concern for me at a major airport like JFK.

You can check your flight #'s against the terminals for the last few days but there is no guarantee they will be the same for your flights.