Don't mean to crash your party, but I'm willing to bet that(giving you get the truck near 60MPH) you will only get to enjoy it for about a second until the truck loses control. Unless you drop the truck to make it more stable but even then I'm not sure it will be enough. Anyways, your best chance IMO getting to 60MPH would be to install the following: .21 conversion kit, sirio .27 or Diablo .28, 3-speed tranny, port the engine like some people do(risk damage to the engine however), a supercharger, a c02/nitrous kit, 22-tooth bell clutch and 64 tooth spur gear, some type of street tires, forward only conversion, tune the engine on the lean side, then put it in a car and drive on the expressway. I think we were trying to figure out a nice way of saying it's not a good idea, but if you want you can try the above.
Sorry, didnt realize a couple people already said most of the stuff on my list.