what to do with brake proportioning valve

Leave it alone, modify it, or eliminate it? Getting ready to 4 link and notch my 87 square

Wondering this myself. thinking I am just going to remove it. Or tie the lever down to deliver full flow.

i removed mine. it was really easy. i just had to bend one line a bit to hook it back up. the truck stopped alot easier after i got rid of it. i dont think the back brakes were doing anything before.