I have a 2003 f350 6.0 diesel 4 dr crew and today as I was backing in our 5th whel into the driveway I had a brake line give way ..its running within the frame and is leaking where the fuel tank is very close to the frame...my question will the fuel tank have to dropped(Ihave 1/2 of a full tank ) I will have to some to fix this week coming..has anyone a idea what is involved in replacing brake line on a dulley

 

People have replaced it without dropping the tank. When I had to do mine the first time I dropped the tank, the second I laid it in, with the extent of going back in before too long.

 

I did the same line on my X last year. Of course it's easier on the X with the tank in the rear. Anyway, i used the copper nickel and used a cheap bender and made a beautiful line. I highly recommend the copper nickel for ease of use.