Spacer lift question

I already purchased the Readylift 3" front / 2" rear spacer kit, I'm going more for the look as a start then maybe later I'll get a real kit.
1 question I have is the rear shocks, as I'm now learning that I need longer shocks is this true?
Next, this kit says up to 3" lift in front but the spacer is only about 1 1/2"?
Then if I'm doing all this work can anyone recommend a front shock that will help with the body roll and dipping when applying the breaks?
I hope I wont have to replace upper control arms with the spacer kit.
Seems kinda like I should have looked into an entry level kit if I need shocks and UCA's?
Thanks!

 

Should get new shocks for the full travel.

UCA's some people say they needed um some said they didn't. I would of gotten them anyways to be on the safe side.

Would never recommend spacer lifts personally.