I ran my first Ranger for years with a power steering box with looped lines. I even raced it on a tight cornered offroad track. Nobody I knew could drive my truck. "What is wrong with your steering!" I finally hooked a pump up when my bosses Race car was broke and he needed to run mine. I thought that was really funny because he was about twice as big as me.
My v-8 truck has a manual box. I don't like it. The power box won't fit though.
The only time you'll ever notice a difference between power and manual rack and pinion is when you are sitting still. Power r&p is just a waste IMO.