Strait, Jerry had sent me an email and asked that same question, I answered his query in a reply. Here's what I answered:
"Yes the rear portion usually does taper. Perhaps someone didn't know that they were supposed to taper and they straightened them. Many I have seen over the years are really bent up and look like they are damaged not purposely bent. In any case that one should fit any wide frame from the 1x8/9 series, the Quiet Line series and possibly even the 82 series."
Richard, wow, thank you for the confidence in my opinion.
"Yes the rear portion usually does taper. Perhaps someone didn't know that they were supposed to taper and they straightened them. Many I have seen over the years are really bent up and look like they are damaged not purposely bent. In any case that one should fit any wide frame from the 1x8/9 series, the Quiet Line series and possibly even the 82 series."
Richard, wow, thank you for the confidence in my opinion.