I work in a shop and I'm working on a 1988 Chevy C1500. The truck HAD RWAL. It has been removed. We are having a issue getting good pedal back. We are not the ones that removed the RWAL system. What we have done is replace the master cyl., proporting valve all the front lines including calipers and hoses. We have also replaced the rear wheel cylinders. The rear brakes will lock up upon a hard pedal push but we can not get the fronts to lock. The pedal feels almost like theres nothing there when pushed until you get to a certain point and then it grabs. Any help would be greatly appreciated. I got hired on here and kinda got tossed in the middle of this. Thanks for your time.