Quote from: "enjenjo"some in 68, some in 69. Trucks changed in 73 Are you sure you have everything? As far as I know, they are all the same back into the early 60s as far as the horn goes. If you are using a late wheel on a 67 or earlier column, you have to use a seperate horn contact/turn signal cam.
To be precise: all GM cars sold in the USA had the ignition switch on the column by the 1969 model year with the exception of the Corvair.
And 1970; Ford, AMC, Chrysler, etc. also moved their keys to the steering column.
Now for weird: those few RHD 1969 American based GM cars sold in RSA and Australia had their ignitions on the dash.