Problem with replacement Idler Arm

Ok I found a receipt that the guy had in a book he gave me with the car. It had was from Napa and had a P/N of 242-3011 for the calipers. A search on Napa's site and Google didnt turn up anything. I was trying to figure out what year and type of car those came off of. I also found another receipt for tie rod ends that he bought specifically for the 71 Scamp.

So the tie rods are correct to the car, but the idler arm is not. Im just stumped as to what this guy may have done. Thinking this might have to go on hold until I can look at the car again. Sucks having it so far away.