Now that you mentioned it, i actually did have to buy a new return line for the PS unit, that goes from the little plastic fitting on the back of the resevoir to the radiator, but they're only like 1 buck per foot, and it's not a hard job or anything. The stock line ended up being about 2 inches too short.
BUT, a word of ADVICE.....When you go to remove the old return hose, it's clamped onto the plastic fitting on the back of the resevoir, BE VERY CAREFUL when you're pulling it off.....i can't stress this enough.....When i pulled mine off i got carried away and broke the damn thing off, which led me on a search for a new plastic resevoir, which i couldnt find.....sure Ford sells them for 45 bucks, but Autozone sells the whole damn rebuilt pump with the resevoir for 39, so i actually bought a whole new unit, new presure line that runs to the rack, new return line and everything.
If you're really careful you'll be ok, just dont wiggle it to hard. If your PS pump is stock equipment like so many are, buying a new unit isnt a bad idea, you might be fixing a potential problem before it happens. If all else fails, just take a razor to the line and cut it down the middle where it's attached and buy a new hose.