No, they are not capable, in a stock configuration, of running continuously at 65. You would quickly kill the engine.
You have two options if you want to run at highway speeds. Change the rear end gears and retain the stock drivetrain, or change to an open drivetrain.
If you really want to remain stock (there's nothing wrong with that) but want to travel at highway speeds,
Patricks has the parts you need to convert your 4.11 rears to 3:55.
