seeing that you have a YJ, the brute kit will not really work for you. not without some serious work. the only thing from the brute kit that wouldnt require even more modification would be the bed, and i believe the rear frame extensions.
the cab close out will not work, and IIRC neither will the half top. if you want to do it, the cheaper, and easier way is to get a top and bulkhead from gr8tops
and have the cut part of the tub closed out, you could use part of the back half that is cut off to make it look more factory. you would also need to figure out where to stretch your frame 10 inches, once again IIRC, you cant do it in the same spot as you would with a TJ.
I looked into this a while ago, so I dont remember things exactly. go over to the AEV forum and ask around, none of the AEV guys were to sure what all it would need since none of them could really remember much about the yjs(yes, i have asked). but they do know their product better then any one, so if you have questions about it, they are the ones to ask.