Well...good luck with the Inline Tube stuff....Mine was a complete nightmare from them......I was upgrading to front disc on my 70 and almost every piece they sent me was wrong....I wound up routing everything as it was originally and then had custom front soft lines made up to accommodate...
What year is your truck?....If yours is stock with no upgrades you may have better luck!
I would suggest getting the assembly manual if you don't already own one....it has tons of detailed drawings...
Also, feel free to scroll through my pics which I took during the disassembly phase.....there are some brake line detail shots in there...
Here you go:
http://picasaweb.google.com/Rackman1111/TruckResto#