Problems Identifying and Matching up new Brake Calipers

As it turns out, I have an even worse cobbled front disc brake system than my engine bay was. My worse fears were realized.
What was my worse fears???
Well, I spent a lot of this guy's time, even though he could have sold me 9 or 10 inch spindles. My shop took off the dust shields and sent me some pictures. Even though my spindle is flat like a 10 inch, the mounting bolt to the upper control arm is a larger diameter than the mounting hole for a standard 10 inch MOPAR spindle!! Which means I would have to get new upper control arms too in order to use Wilwoods.

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..