brakes

[meathead95]

ok here is where i am at. i took the prop valve off of my 2wd blazer because i know it is good. i put it on the truck and bled the brakes and the fluid in the rear bleeders was great. the fluid in the front was just shy of fair. so i get in still no brake light on yet. so i pull out of the garage and they feel better but still i cannot pull my tractor like this. so i drive down the road 1/2 a mile and back and ill be damned the brake light comes back on. so now i know the prop valve is good maybe the pushrod coming out of the booster needs to be lengthened to get more pressure on the front calipers? what do yah think?