you can use the same pump, but you will need to get the correct brackets, for which ever type pump you have (Saginaw, Federal, Tompson) for what ever motor you have now installed ( small block, big block )
i'm restoring a 76 swinger that came with a slant 6. I'm now putting in a 360 and the power steering pump and brackets off the /6 were exactly the same as the v-8 except for maybe the one small bracket that bolts to the timing chain cover.