Dist block or prop valve

My '70 Challenger has 4 wheel disc brakes so I'm hoping this is a distribution block and not a proportioning valve. Cass at DrDiff said it's a dist block so I just wanted to confirm that with you guys. He said if it was a prop valve it would have an adjustment nut on top. I do have a Wilwood prop valve on the rear brake line.

If you guys are unsure, I'm thinking I can take the plug out of the bottom and see if any parts fall out?
It looks ALOT like the dist block shown on Inline Tube's website.
Thanks.

Cass knows his business.

It's a distribution block.

That is a block , not a prop valve .

Thanks guys!! Much appreciated.

Which includes your brake warning light contact in case you develop a leak in the front or rear. Differential pressure moves plunger to ground your brake warning light.

Ok thank you for the info.

AND slides over to cut off fluid to the low pressure (leaking) side. This is what gives you redundant brakes.