This is a pretty old post, and im assuming you got the car back on the road, and maybe this post will help someone in the future,
but the Hurst linkage and plate kit you ordered shown above is for 390-428 Mustang and will mount in that more forward position on your shown tail housing. If you have a small block engine, youd mount your shifter closer to the rear of the tail housing, buy either using a kick back plate or getting the correct Hurst linkage kit for small block and drilling and tapping the rear 3 holes.