Plumbing while adding new rear dics?? help

[LowBuckX]

I did search but cant find it...

The calipers Im using are 80 Malibu fronts. I bought a ajustable prop valve but Im not sure where to plumb it.
1) Between master and old combo valve?
2) between old combo valve and rear line?
3) Eliminate combo valve "T" the front line and run rear from master to adj prop then to rear?
If using #3 would I need to do something about residual pressure check?
The more info the better. Thanks



**** edit I did find bits and peices to aswer my question but would like clarity now. edit *****