I am pretty sure those were an aftermarket item. If I remember correctly, they were made by GTS. Years ago there was a 79 wagon that was local to me that had a set. They were screwed onto the headlight bezel which I did not like as that made them hard to remove. I am not sure if that is what you need to do to mount them or if that is just how that owner did it. I do not have a set for my Pinto but I do I run clear ones on my 86 Saleen Mustang The ones on my Saleen use a couple slotted l-bracket things to hold them in the headlight openings. This makes them easy to remove. They work fine driving at night however when it rains a lot, they make it hard to see at night due to all the rain drops and condensation. So when that happens I remove them for safety. When it dries out, I put them back on.