The key simply turns the ignition on. Another nice thing about this arrangement is that you can spin the engine (like for a compression check) without turning the ignition on (if you don't have a bypass wire between the coil and starter, that is).

Larry Kephart
1937 Chevy Utility Express (Deerslayer)
1955 1st 3100 Chevy (BillyBob)
2017 Cadillac ATS-V (Elvira)
Boca Raton, Florida
e-mail: [email protected]

http://www.laroke.com/larryk4674/1998/billybob.htm