I just installed a 6 inch lift on my 70 Blazer, but now the brake pedal turned to mush. I don't know if I pulled one of the brakelines loose trying to replace the springs. I checked the fluid before the lift and it was fine. After the lift I drove it around and the pedal turned to mush and when I checked the fuid it was a little low. I looked at all the lines and they all look ok, but something must be loose or something. Is there a way to tell which brake line might be causing the problem or do I have to go through each brake?