OK, so I understand you are looking for a kit, but, I have to say that I had to make some brake lines for my '57 Suburban, and it is really easy! A mechanic told me "sure you can do it", so I have jumped in, and there! I did screw up a couple of flares (practice first), but that was it! Also because your truck is modified, it may be hard to find a kit that actually fit not just the truck but also the discs, master cylinder... I actually had a much worse time bleeding the brakes than making the lines...
