Ok. I know the removal of the upper control arm (front) is quite easy. But, to put it in, there isn't alot of clearance to place a jaw puller to push it back in. If I tighten the hex nut, will it just snap into the knucke?

 

yes
u just put the nut back on and put a cotter pin though the hole

no need to use the tool to put it back on

 

Thanks. I'll put my new "used" upper control arm on tonite.

 

It's cake, really. Since you're not going to reuse the old balljoint from the old control arm, you can hammer the end of the stud to push the joint out. It goes back in pretty easy as well. Took me ~5 minutes per side. And I was drinking a beer while I did it.