brakes
Just a thought, maybe the original master cylinder had a vented cap on the master cylinder, and the wilwood master is one without a vented cap.When you apply the brake the pressure keeps building up in the master cylinder, keeping the brakes applied. I would call Wilwood and explain the situation and they will tell you exactly what is wrong, they deall with it every day. There number is 805-388-1188, hope this helps.