1) what exactly did you get? ask Heather
2) what extra did you need to make it work?
Nothing; however you will want an extra spring issolator for each rear spring.
3) how was the install?
I didn't know Jack, but I did know Eddo

Find someone to help, I would have spent 8-12 hours on it, but with Eddo's help, we did it in under three (after doing several more lifts, we were down to under two). Oh, and a five to six foot 2x4 is great for leveraging stuff

(see picts in the midwest section for some of the dayton lift parties for example moose-ing, er leveraging photos)
4) Do I need to change my control a arms?
Need? no. You can come back and add them later. Eddo did, and I liked what that did to his geometry.