My 70 Gran Coupe Convertibe had the factory trailer hitch package.,
The previous owner removed the hitch and the valance. He added the exhaust thru valance since California law required cars to have the Barrcuda valance, even though the car was built in Hamtramck.
If I recall the transport bracket was welded to the frame, no bracket but weld beads.
Don't recall the other bracket.
Car is kept in garage 5 miles away. Will check it Monday.
I will take pictures.
AARuFASTOk everyone go crawl under the car