Mike,
I just finished doing the same thing, cleaning the engine compartment. I have a 78 so the brake line is a little easier to move away from the exhaust than on an earlier car. The line hold down appears to be in a different location. Anyway it's easy to move. Just bend it closer to the inner fender. As for the wiring, I also tried to hide as much as possible and I think I did a pretty good job. All of the relays have been relocated from the engine compartment to under the dash behind the glove box.
I'll snap some pictures of the final product and post here a little later.
Joe