In order to get the sweeps close enough to the crops in the row, I had to lengthen what Deere calls a "Crosshead Arm". It was 1.25" solid bar stock, with each row needing a different length welded on to it. (Part number 8 in the schematic below)
There is something off about this configuration of row cultivator and tractor. I could never get it to sit "right" on the row. I can only guess that something got bent before I owned them. This meant that I needed to make this last minute repair so that I could do my row cultivating. Fortunately it all worked out.