MAybe I should be the last person who should be giving advice about engine bay detailing. But B4 my prang I started to tidy up simple things.
Those hoses that run up on top of the brake booster can just as easily run underneith it. Another thing I noticed in my vette was all those damn wires that run up and behind the wiper motor- they tend to clutter up even the most imaculate of engine bays. One possibility is to have them run along the top of the transmission, another fairly easy job and your wont have to rewire.
Adam