Brake Proportioning valve part number

[pomai]

can't find a proportioning valve from any source, napa, Oreilly's, summit ect?
Am I calling it the wrong name?
Does anyone have the part number?

1988 K5

 

[dyeager535]

I think GM calls it a combination valve. Who knows what the aftermarket calls it.

 

[Hogback Fabrication]

Are you replacing a stock part?

Or adding a proportioning valve where there wasn't one before?

 

[pomai]

Are you replacing a stock part?

Or adding a proportioning valve where there wasn't one before?

replacing

 

[pomai]

I installed into my 1988 K5 a hydro boost system from a 1986 chevy M1031 military truck but am using the original proportioning valve from my 1988 k5.
So I wanted to know if the proportioning valve from the M1031 is the same as my 1988 K5?
the M1031 proportioning valve was located in the same place as my K5 Blazer?

Do I need to get a proportioning valve for the 1986 M1031? or are they both the same.

Dana 60/14 blt with drums.