I just looked in the Aeroquip catalogue. Unless i am overlooking something (quite easily) I am not finding a 1-1./2 SAE O-ring fitting.1-5/16, 1-9/16, 1-5/8, but no 1-1/2. Maybe double check the size in the valve cover. For the -12 AN hose, do you want 37 degree flare, 45 degree??? I don't think SAE 1-1/2 exists.