Update:

I bought and tried the copper/nickel brake lines. I could not get bubble flares done. i was cracking off. Tried many times. But the steel was easy and perfect everytime. since I live in Texas i went ahead with Poly-Armour Poly-Armour PVF Steel Brake Line. they worked just fine. I also went ahead and replaced all 6 of the flex hoses. Works fantastic now.

Thanks for everyone's help

 

Glad you got it done. That couldn't have been a fun job any way you slice it!

 

Very tedious and messy. I had to Cut some of the joint bolts as they were rusted so badly - no mount of PB-Blast and Grip vise worked. I had to redo the joints on all 3 metal lines from ABS Shuttle to the junction. Used Dorman parts they looked good came with mounting plates on the rears. here are some pics of mess and after done.