Would this brake conversion work?

Schyrjajew said
Yes, but I thought maybe you still have to change something, because it is actually meant for a single circle. You probably know better...

But if it's no problem i will buy a 67 MC, distribution Valve and add 2 lines.

Single circle? Say what? I believe all you need is the 67 MC for power drums and the distribution block and just add the two lines. That should be all.