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If you want to install the entire drivetrain, it's not going to be easy...both axles will have to be remounted, the front suspension may be totally different, driveshaft lengths will possibly vary (depending on your cab style), all of the hardware and software from the 302 will need to be moved over, along with the tranny and transfer case of course.
Basically what you'd be doing was dropping your Ranger cab onto the Exploder or Mountaineer driveline.