Rear adjustable upper control arms?
 

I plan to lift my 2door 6-speed approximately 3-4inches, and I know I need a rear drive shaft (plan to get a coast), but do I need rear adjustable upper control arms? Or will my pinion angle be fine without them?

I have the Teraflex 3" lift. It provided 4 inches of lift before installing my LOD bumpers. After bumpers I have about 3.5".
Over 2.5" and you will want adjustable front lower and adjustable rear upper control arms. Pinion angle will be steep. Watch your rear springs as they will bow. You need some wedges/shims, adjustable mounts, or you can cut off the factory perches and weld them or other perches in the correct location. I went with RK spring wedges.
i am still running the factory rear shaft, as are many others.

rear uppers are REQUIRED to set your pinion angle after installing a new u-joint style drive shaft.