Kelsey Hayes disk brake conversion question

10-4 on proportioning valve and hard line between it and the M/C.
10-4 checking brake hoses. ( I did. They are dated from 1992) will stick with them for now since 25 years newer than original. (for now)
10-4 on checking rotor condition and thickness
10-4 on the pistons/ etc. They look rebuilt/pistons clean and rubber seals are soft/supple. and I do know they were on a running Barracuda as of 2 years ago. (the guy upgraded his braking system)
10-4 on foam gaskets between spindle and splash shield.

Regarding master cylinder: I installed a new power booster and dual master cylinder for the drum brakes. WIll see how that works with the proportioning valve to see if good. If not, new m/c will be ordered.

Lower ball joints: Would those be Moog Part numbers: K7021 and K7023 ?? Can someone confirm that please?

I've set the rotors and backing plates aside and took photos of the calipers and spindles.
I THINK I need 2 caliper bolts, based on what I found. Is that correct?
Also, for each spindle, I have 2 large bolts. One side has another bolt similar to a caliper bolt but the hex head is a different size.

Can you all look over the pics and let me know what's missing. Plus, if I need 2 caliper bolts, I see Hemidart67 may have more produced but does anyone have 2 they'd like to sell? And maybe the only similar bolt that I only have one of.

In the interim, will be reviewing more closely the responses above and start taking notes !!

Really appreciate it guys.