I have C/4 from a 66 ford full size passenger car in a falcon. Modulator valve needs replaced and the old one has lost it's color strip. Which one do i need as i have found them with , white , green , black and pink ? The local parts supplier has been no help , they will sell me what ever they have in stock. It does have a 67 valve body in it , i had that done to change the shifting pattern from the green dot original.