Sounds like you were watching unmanned target drone ops. Either the QF-100 or QF-104
QF-100 at Tyndall
QF-106 at Eglin
Thanks for the pictures and that was a good guess but I don’t think they were drones. For one thing they did not have the orange paint.
There was a huge radar station built at Eglin during that time and I was just wondering if they might have been testing/adjusting/checking it out? They were always flying low.