What to do with Proportioning Valve KH 89410

[CDN72SE]

So this is my original to my car valve, is there a rebuild kit available, does someone restore these or are they still out there as NOS?
Never had an issue with any part of my brake system but it is 49 years old now so needs to be taken care of.

[krops cars]

I just wire wheeled my clean with brake clean blow it out. You can try to find o-rings. They are not that hard to take apart.

[Nacho-RT74]

https://www.musclecarresearch.com/content/1979-gm-kelsey-hayes-combination-valve-autopsy

https://www.musclecarresearch.com/mopar-parts

[CDN72SE]

Thanks krops and the ever knowing Nacho 

Think I will give it a shot.

[Gold Rush]

You may not find (or at least think you haven't found) what you need on the Musclecarresearch.com site but if you call and talk with Scott and tell him what you have he will fix you up.  My proportioning valve was a MESS when I started but works perfect now.  Scott gave me a list of items the make everything there well again. I don't recall the cost but it wasn't bad at all... 

[CDN72SE]

Hey Gold Rush, is that Scott Harms?

[Gold Rush]

The guy's name is Scott Hollenbeck.  He is the owner/founder.  Very knowledgeable and willing to help us out..

[CDN72SE]

Oh okay, thanks.

[CDN72SE]

Got the kit in today.