Suspension wizards... Adj upper control arms good for what?

[Back2Mustangs]

I'm lowering this car a solid 2 inches below stock and I was just wondering if adj upper rear control arms would do me any good. Are they just to adjust for better pinion angle? What are the pro's/con's?

Suspension mods going into the car next week:

2" springs
new shocks
bump-steer kit
4-bolt cc plates
polyur front A arm bushings
polyur front sway bar bushings
full-length SFC's
upper & lower control arms

I was going to go all out with tubular k-member, a-arms, coil-overs all around and steeda 5-link rear kit, but I decided to keep this car more mild because I'll be driving it more and I have another fox mustang now to get extreme with. So are adj uppers worth my time?

 

[Back2Mustangs]

Oookaaaaaay... so I don't need them for anything

 

[StangPro]

They are good for tuning the pinion angle when racing in different weather and/or different tracks.

They are a waste of money for most people.
If your car is a street/strip car, keep the stock uppers or go with FRPP uppers.

 

[Slider]

Yeah, unless you are serious about racing then you do not need them. I have a set from Steeda, and I set them to the stock length and have not touched them since. I got them for adjusting my pinon angle for drag racing. The only problem is that I have not had the money or time to race. Save yourself the money, and get the solid ones.