I have installed the American Autowire kit in both of my trucks and a few others and like it. It very complete and made in the USA. The instructions are complete and in color. The guys there are Chevy guys and started making Camaro kits years ago. Keep in mind the higer price is because it comes with everything including the headlamp grommets and connectors. The fuse panel is a modern panel and does not use the stock fuse box.

If you want a more orignal look especially under the hood look at the Carter kit. Both companies stand behind their products.