I swapped my 3 spd to a c4 during the build. I have never seen how the stock c4 metal lines are ran since I had a manual before the tear down. I have the 'in-line tube' pre-bent hard lines for the c4. I am running hedman long tubes also. I only spent about 10 min under the truck trying to thread the lines in, but it appears next to impossible. I have searched but did not come up with many pictures or explanations other than "try to get the lines to the top of the frame rail". Do I need to modify some of the bends on the pre-bent hard lines? Pictures are worth a thousand words some times.