A quick search finds that some people over at tempotopaz.com have done this. It looks like when the power steering is installed, the alt sits higher and is driven from the ps pump by a v-belt. Like this:
The ps pump is driven by the serpentine belt. When you have manual rack, the ps pump is removed and the alt sits lower and is drivern by the serpentine belt. Like this:
You will need to go to where you got the manual rack and get the mount and pulley for the new location.