Im doing the F150 disk conversion right now, and im hung up on what brake line to use that goes from the axle hard line to the calipers. Ive heard people just making there own, but i want to know if anyone has used something that i can go to Napa or Checker and pick up. Thanks.

You can just get ones for a 79 they will have the right setup you are seeking. Or you can ditch the 3rd rubber line and run a steel one to the pass side, then run two long one from the frame to the calipers.