Does anyone know if a later model 5.0 liter V-8 will slide into a 92 in place of the 4.0L V-6?

94 and later you run into size limitations. The cobra motors and the 4.6 motors are larger from the Heads up making it a tight fit in the explorer. With the 89 to 93 302's you still have to trim the heater bos unless you have a 3" body lift and it's still tight between the frame and headers.

Good Luck.