A toy would be set up a similar way up front and you can do something similar in the back, or the cylinders right-side-up in the rear with a mount off the bridge/crossmember:
http://viewmorepics.myspace.com/index.cfm?fuseaction=user.viewPicture&friendID=387834500&albumId=1264392 Factor a 2 dump setup (kit), 2 pairs of heims, accumulators, and if you're going the Hydroholics.net route, some threaded sleeves will help with with your install and fine tune it. You'll also get some batteries (2-4 depending on speed). You'll also need some small hardware, and welding cable and a quick release ground. You can also do some more fun/cosmetic items such as hardline, gauges, switch extensions, etc.. I can't think of anything more awesome than a juiced toyota - do it!