Take a look at the hose and the clamp where it is clamped onto the fuel
filter.  It may not be in that bad of shape, depending on the year of your
truck.  Firstly, what kind of clamp is holding it on?  If it is the spring
type that you use linesmans pliers or vise grips to squeeze together and
then pull the clamp back to release it, I would throw it away and put a
normal hose clamp on it.  But before you put the hose back on, if you have a
few extra inches of hose to play with, cut an inch or two off the end of the
hose.  That way, if there were any cracks or pinholes right at the end of
the hose, you just eliminated them.

The reason I don't like those spring type clamps very much is because on the
way home one night on the highway, in my 1984 F-150, I suddenly noticed
steam coming out from under the hood.  Realizing something was obviously
wrong, I pulled off to the side, popped the hood and was greeted by
pressurized antifreeze spraying from what I thought was a worn out heater
core hose where it goes into the water pump.  I had no choice but to call a
flatbed to come get me, the hose and coolant were way too hot to try and do
anything with them, plus I had no tools with me at the time.  That and it
was getting dark and I didn't feel like walking 25 km home.  When I opened
the hood the next morning with the truck in my driveway, I immediately
prepared to change both heater core lines.  But once I grabbed the heater
core line and pulled it straight off without even touching the spring clamp,
I knew what had happened.  The clamp fell to the ground and broke into two
pieces, obviously worn out.  I replaced it with the same size hose clamp and
no leaks since then.

Just something you may want to try before you go to all the trouble of
replacing the entire line.  Unless it is noticeably brittle, cracked or just
in bad shape visually, I would try my suggestion first.

Good luck
Sharky