Hiding the wires in engine bay
Some photos in this post.
http://www.forabodiesonly.com/mopar/showthread.php?t=176755&highlight=Modernized+Engine+Wiring
No need to go whole hog and install a relay box like I did. I bought the PVC tubing on ebay. I knew about if from having spec'ed it years ago for an industrial product design. Easiest if you run wires thru before terminating. I pulled my existing front lights wires thru w/ the 57 terminals already on, which was difficult.