Sorry about my terse reply.

I was referring to how the 47-53 ignition switch mounted, vs how the 1954/55st switch mounted.

See photos attached below (and at the links, below).
https://www.classicparts.com/1947-53-Ignition-Switch-Original-Style/productinfo/53-405/
https://www.classicparts.com/1954-55-1st-Ignition-Switch-Original-Style/productinfo/53-407/

Attachments
47-53 switch 53-405.jpg (23.17 KB, 84 downloads)
54-55st 53-407.jpg (29.34 KB, 84 downloads)