Just a few short notes,
NEVER use copper tubing for brake lines, one of the concerns with old lines and brake fluid is COPPER contamination migrating into the fluid from degrading lines.

I believe NAPA has epoxy coated steel lines that are bendable, and that would be a good way to go.
Hydraulic brake systems are nothing to take lightly, because we count on them working properly when needed.
If you can, either have a shop that can do the job right handle it , or get the correct info and tools to do it yourself.
Unfortunately there are a lot of folks doing brake work that don't have the slightest idea of how the work should be done. There are reasons why some shops replace many parts because they can't afford comebacks and liability issues. Not all videos are accurate and need I say nothing further.

As Scott mentioned, most folks that know don't interfere with good advice when it is suggested.
When someone cannot get an immediate response to a concern, there is usually a good reason, we have to work and are not always available to provide immediate replies.
Thank you for your understanding.

 

I didn't know that about copper lines, good to know.

 

A lot of times the copper corrosion (which can happen in steel lines since copper is used in them) is due to old fluid that has accumulated too much moisture.

Testing for copper:
https://www.brakebleeder.com/solutio...opper-testing/

The brake fluid should be flushed every 3-4 years IMO. Poor quality brake fluid (old and/or degraded) is at the source of MANY brake failures.

As far as the pic of the DIY brake line ..... the lines look like they may be restricted at some of the bends (easily can happen without a tubing bender tool).

 

Wow thank you for the responses...I thought that the nickel copper lines would be better than replacing with steel because they wouldn’t rust...I also have flushed about a gallon of new dot 3 my lines and it’s all clean new fluid without any air in the system...the way I bent my line was by using a pipe to form the bend and I had the old one next to me and just made a duplicate...there are no tight bends at all and fluid is moving into those right rear pistons freely...but now that I know about the corrosion from within, maybe I’ll look for a stainless line to do the rest of the system..well I learned something new today...thank you...

 

Not wanting to contradict, but 90/10 copper nickel is a stable and corrosion resistant alloy that people are using more-and-more in brake service. It can not really be compared with straight copper. I am not sure that I would worry about changing it, but I would test the fluid fairly regularly. As stated above, copper in the ABS system is definitely not good!

https://www.copper.org/applications/...ube/brake.html

 

You might want to double check the line feeding the back brakes as well to make sure they are not rusty either. That is an easy straight run if you need to do it.They often go bad under the clamp which hold the line to the frame.