My 65 Dart also has the red clamps securing the hose to the nipple on the filler tube as did the 65 Valiant 'vert I parted out. I've also seen the same style and color clamps on the power steering return lines on the 67 and later.
Don! You are so right. I have heard of it but never seen it. When you mentioned this I remember that from the beginning I replated my clamps in black phosphate. I wonder if I can have them replated in red?