I had my entire driveline out of the car when I did mine... and it was a PITA because I didn't have all the illustrations I would've needed (at the time), so a few things got 'custom' bent and routed a little differently than what the factory had (In my defense, I had just replaced my entire front clip, floor pans, trunk area, etc., so I didn't have any factory indicators of where everything went still on the car).
My kit was from Inline Tube, and I was initially happy with the kit, but after beginning the installation process, I was less happy. I got everything in position, and installed all unions with care to avoid any cross-threading, as well as what would be considered 'normal' torque ratings for brake fittings (get it all to finger tight, then apply about another 1/4 to 1/2 turn). Then I began to 'gravity bleed' the system, and the leak-fest began. Every one of the flares required me to crank the fittings down almost to the point of rounding off or breaking things before they would quit seeping. I got the OEM kit (not the stainless), expecting it to go together without having to resort to applying "gorilla torque" on all fasteners. Boy, was I wrong.
I'm not sure if they were just crappy flares (every single one?!), if they used the wrong flare angle(s) for the application, or what. All I know is that it sucked, and I was tempted to rip them all out and go with a Classic Tube kit (which, from my understanding is also regarded as a high-quality kit - so, the same problems might've persisted anyway).
I'm not saying they make a bad product, or anything like that in the least. All I'm saying is that I had issues getting every single flare to seat properly and required near Herculean efforts to get them tightened enough to seat and not leak (I'm pretty strong... snapping off Grade-5 bolts is no problem - especially when they're holding together something really important
).
I hope that maybe I just got a 'bad' kit or something... because otherwise, it's really a nice kit.