After Dec 1966 (approx), Ford went to the larger brake hose connection on the K/H caliper.
I've never seen a date on this hose listed in the forum before, so here is a pic of my original (I believe) front disc brake hose.
It's about a two month spread to my build date, as expected (see sig).
That's 27 12 6 on a C7OA-2078-D hose (Dec. 27, 1966).
I also have an 05 12 6 hose from another car (Dec 05, 1966).
edit -- cleanup my phone typing and generally restructure the post.