The second horn was available as an accessory in 1954 (see link in post above).
The 1953 dual horns were mounted on the intake manifold or the firewall.
I doubt they would fit on the front of the radiator support with the 1953 grill.
Do you have documentation that shows otherwise, Greg, MT, Brad, others.
Also, I’ll try to remember to post photos of some car sea shell horns that have mounting posts in different locations on the horns, compared to the truck sea shell horns.
