To start, you have timezone or computer time issues, you are a day ahead of yourself...
Second 'do the front end' is total bullshit which could run into the Thousands and thousands of dollars.
A slight 'bounce' at 60 when the tires go from being compressed to expanded from the centripetal force is usually a wheel balance issue or even a bad shock issue. If it is a tire issue, the 'bounce' will change if you rotate the tires from front to back. That is usually the first thing to do.
Your description could mean a lot of things.
U-joints will start a vibration at those speeds when going bad also.
Where do you feel it? In the seat of your pants or in your hands?
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail > Hello,