Rob's pic's Pretty much prove that it's not for a grey. Looks like it would fit up to a HR or something similar. A mate of mine used to have a HR van with an impala fitted .It was always locking up, and he carried a lump of 2x3 under the seat to adjust it when it did
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Years ago we used to make up a floor change for greys by knocking a hole an the floor and fitting a home made shifter. It was just a straight bar with a linkage piece welded on the side and a bolt welded to the bottom.The bolt went through the first and reverse selector and the linkage fitted up to the second and third selector . Wasn't very Pretty and had a large gate depending on the length of the stick but worked a treat.
Looked something like this
Brad