Welcome Kapps.
I'm building a 72 CB500 also. You can check out my build thread in the big arse section under cafes- http://dotheton.com/index.php?topic=14084.0
This website has all the info you need... you can download manuals and schematics here, too, which has saved me at least the cost of tracking down and purchasing them.
If you can't get your questions answered here, there may not be an answer.