88 mj proportioning valve

[Truckcom]

I am the second owner of this Comanche and have had it for 19 years now and have experienced minimum brake issues.  During my ownership the proportioning valve rod [8"] has always seemed too long and the lever at no load stands between level and straight up.  I estimate a rod of about 5" would make it level.  The existing rod seems original but, of course, I can't be sure.  Does anyone know the length of the original rod? 

[Eagle]

Length of the rod isn't the issue. The lever on the proportioning valve should be approximately level (horizontal) when the truck isn't loaded. Maybe your springs have sagged?

[HOrnbrod]

Make your own:  http://comancheclub.com/topic/16955-adjustable-mj-load-sensing-valve/