You have two options on I-35 ,ride in the right lane and get stuck there at 60 or ride in the left lane and go like hell with everyone else.
You could always pull over, take a few puffs of loco weed, then take a nap like Willie Nelson. Same part of I-35 I think.
I once got lucky, and tucked in behind a Deputies car just south of Dallas. The only time we slowed down to less than a 100 was in Austin. He had a steady following of about five cars all the way to San Antonio.