Due to the fact that the companies that make them do not feel the need to respond I have decided to make my own.
Already ordered everything but can't find the info or where to look for all the nuts and connectors. I want to do
all brakelines front to back. Who can point me in the right direction or has the info. (1995 Monte Carlo with drums in the
back, and cause I also bought a 96, same thing)

 

Found it, They are metric M10x1.

 

Thanks for adding to your post for people searching in the future!

That's on my to do list also, just haven't got to it yet. I did have to replace 2 sections back around the center of the back seat, but I just replaced the foot or so that had rusted through. Didn't have a garage at the time, so I did the bare mininum to get it back on the road. Luckily that was the only rusted spot on mine, but it still looks tacky with a bunch of extra flares and unions so I plan to pull the whole thing to do what you're doing at some point.

 

Just do them all. Replace all brake fluid and be safe and done with it. I have all the microfiche parts catalogs and found the info in there. Un fortunately could not find the unions. Nobody seems to sell the GM parts. So I'm gonna reuse the old ones, everything else will be new stainless.

 

One day, lol. Trying to finish building my garage so I can get my tools unpacked again - haven't seen my benders / flare tools in probably 4 years now. They're totally pressure tight though, I did flared unions on both sides of the replacement sections.

The odd thing on mine is there was a very specific area they failed - One 90 degree bend around the back seat. One rusted through until it popped, the other was pretty ugly in that same spot. Oddly enough, the lines otherwise look 100% fine (and I suspect the insides are all fine also, as when I cut out both of those sections to repair it out in the clean part of the line the insides looked perfect still). So there must've been some kind of damage to the coating / surface in that specific spot.

Even though I only replaced a short chunk of each, it forced me to replace the fluid again at the same time too (I did it once before when I upgraded lines + did the rear caliper swaps back in the 00s). I'm far too slow with a flare tool to have any hope of saving fluid, and the one side had a literal hole leaking fluid the whole time I was running around gathering parts.