Next Episode of " Name these Parts !"

First up is a narrowed 8 3/4 mopar.
Total width axle flange is roughly 30 1/4"
Housing is roughly 25 1/4"
and the mounting brackets are at 18"

What would this be for ?
As in Drag car, Pro Street ,
Ladder Bar or 4 Link ?
Solid econo rail ?








#2
Is some 64-67 Mustang Calipers mounted on some adapter brackets.
Summit has these brackets , well out of stock. But doesn't say what they are for .
SSBC-USA A24118






#3 Next up is this Brake valve , couldn't find anything on it ! Is it mopar ? For what ?



# reads Y3 270



And then these bad boys. What brand ? any Ideas ? Uni-mount 4.5 - 5"

Thanks again , for any info on this stuff !