I realize this thread is a few years old but I'm in the middle of this project right now. I have the sub mounted in the enclosure and wired up, ready to go. Im working with a 2011 jku with infinity sound package. All I have done to the sound system so far is run my aftermarket amp and wiring (have not yet made the connections) and modified the rear enclosure to house the Alpine Type R 8". At this time I'm planning on keeping everything else stock due to funding, and also security reasons as we all know how easy the wrangler is to break into. So I consider it more of a stealth build/mod. The reason I haven't made the connections to the amp yet is because I ordered the wrong line output converter for my year wrangler. If anyone is interested in knowing my full setup, parts I used, how I made my custom spacer for the enclosure to compensate for the extra length of the sub, etc. I'd be happy to post it all.
But in the mean time, here is a pic of how the sub fits in the enclosure with the spacer I custom made