I was surfing the other day looking for a wiring diagram for a concealed kill switch. I found this site.
http://sonolithics.com/files/bosch.pdf There are several diagrams for kill switches, door locks, alarm and security. It is a 45 page PDF. I think I may use STEALTH STARTER INTERRUPT on page 15 or KEYLESS ENTRY W/CIGARETTE LIGHTER/EXTRA SECURITY on page 16. I hope you find this stuff useful.
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Father and son built. Driven daily since 2012. 283, 3 speed. Mostly original. '81 PS and disk front. Fuel tank relocate.
Maintenance, repairs and upgrades on his dime now.
http://zacks64longfleet.shutterfly.com/
Higher res. photos in my gallery.