Yes I did, when I went from disc/drum to 4 wheel disc.

I replaced the master cylinder at the same time. I flushed the lines with de-natured alcohol, but I understand that you do not have to. I then left the lines to dry overnight. Bleed them as usual, works great going on a year now.

One thing I did notice though, DOT5 seems to find the leaks better then DOT3, even a small amount of looseness in a fitting will cause it to drip.