What is the reasoning behind putting a HO 5.0 into a truck already having a 5.0?
If you just need to replace the motor then the long block would work, but you would have to change the cam out to work with the trucks electronics. The firing order is different between a truck 5.0 and an HO 5.0, the reason for changing the cam.
If you just want the mass-air of the HO 5.0, then just get the mass-air kit from Ford Racing for the truck.