JKWILSON: I have what I believe to be two original 66 fog light brackets. One is marked at the top, on the inside portion that faces the engine compartment, "TOP RH" , the other is marked "TOP LH", in the same place. There does appear to be a difference. The bottom hole located on both brackets has a flat area in it. If you look from the front ( the part that faces forward), the flat area on the left hand bracket is at the 5 o'clock position of the hole, on the right hand bracket, the flat area is located at the 7 o'clock
position. other wise the brackets appear to be identical. If you don't have a left hand bracket maybe you can modify one of the right hand ones you have.
John