Hi all, I am restoring a 1989 GMC R2500 Suburban 3/4 Ton I changed the Front Disk Brake pads and Rotors with new ones, repacked the bearings with fresh grease. The brakes work great, they stop straight and fairly hard. I drive around on them all the time. But i cant lock up the front brakes! For normal driving everything works perfect but in a emergency I cant stop! Its just doesn't have the power. In an emergency i need to be able to lock the brakes up! I did flush the lines about 5 times, there was some serious goop in there. But after about the 5th flush it was flowing like a river. What could be the issue? Do i need to change out the caliper? I drive this thing pretty darn fast and need to stop! Please school me! What do I check? Thanks!