Pics of 71-72 proportioning valve needed

[rockyrivermark]

So I'm gone through everything in my braking system and still have some slight dragging up front, only after I've been driving a few min and things are hot.
It's looking like the proportioning valve which giving that truck sat for a few years I'm not surprised.
My truck is a 1970 which originally had 4 wheel drums. Previous owner upgraded 6-5 lug and hence I got front discs. Parts where from a donor 1971 c10.
Here's a pic of my proportioning valve.
Only one line for front and one for rear.
Please post a pic of your proportional valve from a 71 or 72.
I want to make sure I have the right one.
Thanks.
Replaced
Calipers
Calipers hose
Master cylinder
New pentosin super dot 4 fluid
Adjust booster to master rod