Or find a wrecked later model 5.0 AWD with a decent frame and put your 94 body on it. But Kris is right, the 2 suspension and drivetrain setups are very different, including all the frame mounting points. The AWD system is made to work on the torsion bar setup of the 95+, not the 91-94 setup. Now, you could always swap in a 5.0 and if yours is 2wd, convert it to an early model style 4wd. That would work. But like Kris said, it might just be a whole lot easier and end up being cheaper to buy a later model 5.0 AWD truck.