Does anybody Know the how much a Highboy front steering proportioning valves go for .
Thanks
Mark Focht

I dont' think anyone here distributes stock ones, so I would check with the parts store.

get a willwood adjustable from summit, my 87's was completely unavailible.. i couldn't even find someone who sold originals.... my 2 cents

Are talking about the proportioning valve for the brakes, or the power steering assist valve assembly that goes from the pitman arm to the steering arm on the knuckle? If it’s the proportioning valve for the brakes, you can get parts or buy new ones from LMC http://www.lmctruck.com/icatalog/fc/0109.html
If it’s the hydraulic steering valve, then don’t bother with it. It’s too expensive to mess with compared to a power steering box swap.