car 6S1431 had one of each I bought it in 1971 and they were like that when I got it, the original owner says he never changed them
Car also has one Ray Brown and one Impact Seat belt
Thanks yes there are always a few cars that can turn up when your looking at non-critical change over points
Of course seat belt and horn don't really compare in any way given they were different parts installed at different plants and of course the Shelby VIN doesn't give us much to go on by way of when it was built at San Jose
Did you happen to record the dates from the horns? Guessing not but worth asking