I did the swap in my dart, and had to use the early V8 centerlink, not the later as it is wider hole to hole. Set them next to each other and you will see about an 1 1/2 difference. Just enough so you can't adjust the tie-rods and have any adjustment left on one side to make them even. I ran across the same problem when I did the motor swap. Plus the early v8 pan has an extra dimple on the drivers side to help clear the pitman arm. I banged my head against the wall for a while about the centerlink thing till I had all three types side by side. Early slant six drop is shallow and narrow, early v8 is narrow and deep, later v8 is deeper and wider<---reminds me of a girl I once knew.
