Steel Concepts conversion - combo valve?

[BrianH323]

For those who have converted to manual brakes with the Steel Concepts kit using a Wilwood master cylinder. What did you do about the combo valve on the frame? (Is that what it's even called? Combo valve, prop valve?)
Some people say eliminate it, others left everything hooked up like stock.

Brian

 

[mean78malibu]

I replaced mine with an all aluminum one made for GM Disc/Disc applications. Bolted right in.

 

[wiseman79]

I removed mine. The steel concepts MC is proportioned already 70/30. I believe the combo valve would further scew the pressure ratio from front to back beyond 70/30. You will need a wilwood residual pressure valve. BTW I have a new one I don't need anymore if you want to PM me, would go cheap.