Advice on Swap to Dot 5 - New MC

What was the little bronze colored box that the MC went to then
Distripution block or safety switch block
it divides the front one line into two front lines, and the rear one line into two rear lines.
rear is single line out/

Does that not proportion front to rear or just side to side?
Nope. just tees the front and feeds through for the rear.

but everyone else told me that was the proportioning valve.
Well you can look over the material from Cheysler and make your own decisions about everyone's knowledge. ;)