We found a drawing for this part in our set of original factory drawings along with the engineering and production change requests. Had they continued building cars, this part would have replaced the Big Head Studs
(yes, that's their real name) that hold the trailing arm shield/air deflector plates to the underside of the car. We had them made in stainless steel with stainless hardware to last the life of the car..
This part number is for two - enough to do the whole car.