Hydro boost swap

[atotalnincompoop]

I have swapped a hydro boost system from a 99 gmc 2500 van into my 55 gmc pickup (4w disc setup). I purchased a disc/disc proportioning valve to run on the truck. I'm having issues with bleeding the brakes.
From what I've read the mastercylinder does not require a proportioning valve as the abs system handles that. however, since I am not using the abs system, I installed the proportioning valve.
Should I be running the prop valve on the original 99 gmc mc or should I swap in a different style nd and then run the prop valve?
Thnx☺