So, we broke down and bought the Eastwood brake line flaring tool. I bought a Inline Tube stainless pre-bent line kit for my truck. I am running disc brakes in the rear and an aftermarket master with different line routing that stock. I needed to modify the lines to work with the parts I have. Originally, I was going to sell of the lines on the rear end and lines going to from tee/union up to the master and recreate them with nickle copper.
I did some digging and found this tool that had great reviews. I had never bought anything from Eastwood before. I've heard good things about this so I thought let's give it a try. Much to my amazement, this tool flared 1/4" stainless like butter. My kit came with the line for a longbed as well as a shortbed so I cut up the longbed line and started practicing. Shown below is my 5th attempt. The only rear quick I found is making sure the cut is absolutely square. I ended up using a hacksaw to cut the tubing, mainly to keep the heat out of it, and using a bench belt sander to square it up.
Long story short, this thing is worth every penny.
Here is a demo I made of making the flare shown below. It is at the end of the video.