80 minutes is fine for a domestic connection - all you have to do is go through a boarding pass check to make sure they've checked your passport and have any required API. No security,since that was done at EDI. It should only take about 10-15 minutes (possibly slightly longer if you are bussed and don't get a gate) - once you've had your BP checked, then you just walk straight through to departures.
They are unlikely to let you standby on an earlier flight.