A complete firecat cooling system works well, but isn't as easy as it sounds. The rear heat exchanger is basically a piece of the tunnel, so the tunnel must be cut for it to work. If you cut the hole too large you're kind of screwed...
You will need to find a place to mount the coolant bottle under the hood.
If you use the Fcat cooling, the lines run on the outter edges of the running boards...they simply rivet on. I believe you have to use them on opposing sides, as the bends work better that way...I don't particularly remember.
You can kind of see how it works in this picture. Lines running down the sides, heat exchanger in the middle, riveted in.