Hose Techniques offers some nice colored silicone vacuum hoses. They cost about 1 1/2 times more than your typical rubber hose, but they are well worth it. They really sharpen up the engine bay and the hose will not harden near as much over the years, making removal and reinstallation of the hoses much easier. Take a look. I chose yellow of course.

A starter kit from Hose Techniques will get most of the job done, though a few scraps may be necessary to finish all the hoses. You can order the hose by foot, in the starter kit, or in the Extreme Kit. Hose Techniques has promised that they will have a Z31 kit ready, but they keep promising and don't follow through. So, for now, don't waste your money, get what you need, a starter kit.

I've also installed the stuff for the washer fluid hoses. There was plenty left over to make it. Here's the starter kit...the cool thing is it comes with a nice cutting tool, some Ricey stickers (please hide if you're going to use them...don't put them in an obvious spot), and some good candy that say "Hose Techniques" on them.

I warn you of one thing, these hoses are soft, and certain uses may ruin your vacuum and cause yucky noise (vacuum leaks). I had ONLY ONE problem...this came from one of the hoses that runs by the Radiator Cap, over the front side of the engine, and then to the back of the Intake Collector. It is a thicker sized hose. When I gave the gas, this one would expand and allow for leakage. I since replaced the hose with a normal, black vacuum hose.