Relocating P/S reservoir

[Grant]

Thinking of putting the power steering reservoir into the back, couple of questions clanging on around in my head if someone would be so kind as to help shed some light;

-Does the level of the resevoir in relation to the P/S pump have any baring on the fluid? Would I need to be re-installing it back into the same level?

-With the added plumbing, will i need less fluid in the reservoir as there is more in the system? If that makes sense? I.e. more pipes holding more fluid, so less in resevoir? No?

-Will fuel hose fit the bill?

Muchos gracias.