and a couple brake lines that are in ok shape that I didn't have to remove.
How do you know these lines are in ok shape? They rust and fail from the inside out...the outside might look new, but if you haven't replaced them, how do you know their condition??? Going down a hill with a loaded truck and loosing your brakes due to a line failure would not be fun for you or those around you!
Be safe, lines are cheap and easy to do AND you have the system apart for the rear swap...no beter time than now!
Mike B
