[chevymad]

One more possibility. Long shot though. Do you have the original type PS lines? I once put a set of "universal" lines on a truck and had nothing but problems. The ends werent bent correctly causing the line to make a tall loop. The loop would then trap air at the top so the system wouldnt bleed correctly. After trying for hours to get the thing to bleed, I finally talked the parts guy into ordering the correct lines. Installed the next day and had no more problems.