It took me 30 - 45 minutes to install. It's really a two person job because it's kinda heavy and it helps if another person is present to hold the thing up while you screw in the bolts.
I just installed that kit. I still have a slight rake (about 1.5" difference) but it's alot better than before. Here's what it looks like now with the 1" leveling kit.
Man that would be sweet if you can help me install it. I will pay you a nominal fee for your trouble . Where did you get your spoiler from? My spoiler has the brake light facing down instead of like yours facing out.....