I had the same problem as you. Neither the shift rods for the aluminum nor the shift rods for the iron box will fit, you will need to make your own. I cut and used bolts to lengthen and I welded them together until they fit. I did need to flip one lever (probably didn't have to, but it was easier that way). The flip switched the position of 1st and 2nd though so it looked like this
R23
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1983 240D 3.0T 4-speed manual, now sold

1989 Subaru GL Wagon 5-speed Touring Edition