I did not touch my brake lines. They give you plenty of line from the factory. I also added a 4 1/2 add-a-leaf at the back I forgot to mention. I get a lot of waves from Jeeps and other truck owners and I get a lot of 'Darn, man, that truck is really sharp' compliments in parking lots and stop lights.
If you are going for the prerunner look it won't look right unless you get glass front fenders to finish the look. If you don't add glass fenders at the front at least lift the back a few inches. It will finish that look you want.
I see some mid sized and full sized trucks with 'way too much' front end lifts here in Florida and everybody laughs at the trucks when they see them. They look really retarded with the front sitting up about a foot or so above the front tires and the rear is sitting almost on top of the rear tires.