Well the 42RH OD unit hits the shifter rod and pushes it outward at the bottom. I came up with a way to mod the shifter rod to clear the side of the transmission and still keep everything lined up. I made a temporary jig to hold everything in place until it could be welded. I actually tack welded the rod to the jig so I could cut it apart and nothing would move out of place. It worked very well IMHO.