I have not done this swap. Based on my measurements, the 73 and 74 tie rod ends are the same. Rockauto.com also shows the same part number for both. The 71-72 are the ones with smaller tie rod ends. This assumes no end of year carry overs.
Note that 74 spindles (including the drop spindles) are about 7/8" taller measured ball joint to ball joint. If this is the only change, I believe this would increase camber gain during bump. I measured the vertical distance from the lower ball joint hole to the spindle centerline with the following results: 72~2.5", 79~1.4", drop~3.4". So the 2" drop spindles will lower the 71-73 cars by about 7/8" based on this. Again this is based on component measurements and not on a final installation.