I drag raced full size Trucks for several years. There is a reason they don't allow the kind of speeds you want to see in stock form... They have the aerodynamics of a barn door, and the tires truly aren't rated to handle it. Not to mention those driveshafts will turn into a bomb at anything higher than what they're governed at most of the time. The speeds and forces they experience under that truck are more than you can probably wrap your head around.
If you do some things to make it safe, yeah, it's a little better but you're still flirting with disaster. Have one want to get loose at that speed and you might as well stick your head between your legs and kiss your ass good bye.
I've had my truck between 160-170mph more than once but it was built for it, it had the suspension, brakes, drive shaft, tires, and power to do it. Not to mention I was single with no kids. No way in hell Id do that nowadays. These days I feel like John Force if I bump 80 getting on an on-ramp.
Bottom line is, the vehicle is not designed to move along at those kinds of speeds, it's not just liability, it's not just tires. There are lots of reasons. Not to mention I doubt you've been to any sort of driving courses to know how to handle something moving that fast. Things happen faster than the blink of an eye at that rate of speed. Tell the dumbass in the V6 mustang to fuck off, and you can enjoy the privilege of waking up.