Not to try to confuse things, because my steering rack on my 78 wagon is leaking PS fluid, but when I first bought my presently owned 78 wagon in 1986 I was told the inner tie rods couldnt be changed only the entire rack.
A few months ago, I had one of the inner tie rods replaced and watched it be done myself.
How do we find out before we remove the rack which one we need? From what I see, the difference is the input shaft length.