Problem with replacement Idler Arm

I looked at Rockauto and they list the same part #'s from 71 through 75. I wonder if it is just that specific brand?

I also still have the 68-72 idler arm that I ordered. I figured no sense sending it back if it is what I need. I picked up the steering box and the matching column at the same time so Im good to go on that part. I just have the feeling I need to swap the center link. Of course pics will tell all.


My goof. I had looked up the 69 part number and it is the ES319 series. 1970 up is correct.