you say you got upper balljoints from NAPA. That's great, what brand? Before you start to tackle this job, make sure that you have control arms that allow you to remove the balljoints. Many of the Ranger upper control arms have the balljoint CAST in, not PRESSED in. What that means is that whe you go to change the balljoint, you have to do the whole control arm. Now, mind you, that's not EVERY Ranger, just most of them. SO make sure that it can be done.
As for your actual question regarding the control arm bushings where they mount to the frame, no, there's no way of greasing them at all. There's no zerk (grease) fitting in them. If you remove the control arms at all, the only thing I would do is maybe apply a little bit of silicone into the bushing where the bold goes through. That will allow the bolt to go in easier and cut down on potential squeaks
2001 Chrome Yellow Edge 2WD Reg Cab 4.0 SOHC