You can buy a Haynes manual at any auto parts store usually and it has a basic diagram in there of the ignition stuff. A Chilton manual will give you greater detail, but they cost a little more. I just used my Haynes manual to wire up a push button ignition on my Cobra.
I can get you the wiring schematics, i have them on the diagnostic pc at work. What exactly do you need? is it a certain circuit? i have all the wiring schematics so let me know.
horn, cruse control particularly steering column area. I have some conectors unhooked under there don't know where they run. The reverse lights I have a manual trans anyone know where the switch is at? I havn't looked for is yet, probably eazy to find but, if someone knows where its at that would be sweet.