Problems Identifying and Matching up new Brake Calipers

the pictures above look like a standard 73-up disc brake set up so i'm wondering what you are talking about when you say its cobbled together... who have you been talking to? do they know what they are talking about? does your mechanic know what he is talking about? sounds like a bunch of misinformation being thrown around..
My car is a 67 Barracuda; that's why!
We're trying to figure out how to low-profile upgrade.
Have now given up.
I am currently trusting the opinion of the suspension and parts Guru that I talked to at Carlisle.