If he has 2wd (I see no where suggesting that it is 2wd or 4wd), a simple pair of spacers will level it out. If you are 4wd, cranking the torsion bars usually gets them level. Either way an alignment is needed after.
I leveled my truck out (2wd) with a Fat Bobs Garage spacer kit. Installing it was a pretty straight forward process and only took an hour and a half or so. Basically this is all you are doing:
-Jack up the truck as far as you can and place on jackstand.
-Remove wheels and calipers/ rotors
-Take shocks out
-Unbolt tie rod end
-Place jack under lower control arm and lift slightly
-Unbolt upper ball joint and seperate
-Lower the jack that you placed under the lower control arm all the way
-Take stock spacer out and place leveling spacer in
Thats the short, dirty version for the 2wd. the 4wd is a simple as climbing under and turning a bolt.
This is before:
This is about 2 hours after: