66 Dodge Dart upgrade Dual conversion help!

Going to be doing a dual master replacement soon on my 66 Dart and had some specific questions. I also want to replace all the hard lines but don't want to bend my own lines and was thinking of buying the pre-bent lines.

I understand I have to run from the rear distribution block to one of the outs of the master cylinder but how do I do this? Do I put in an adapter where the rear to front line ends (at the front dist. block) or does someone make a complete rear block to master cylinder line?

Also I realize that I need to utilize two of the ports on the original front distribution block, and block the original rear outlet on the block, but if I use pre-made front lines will they physically fit or will they may need to be extended.

And finally, if I do decide to make my own hard lines, is copper the way to go or do you all suggest a different material, and what about the spiral metal jacket used on some parts of the lines, does that need to be replicated in some fashion?

Thanks and sorry for all the questions.