HELP - rear axle brake lines

Hello folks, I hope someone can help. I am in the process of swapping an 8.75 A Body rear in my '75 Scamp to replace the 7.25 rear. I just ordered my axles from doctor Diff, have a 3.55 carrier, and I will be using the current 10" drums backing plates on the 7.25 - they are big bolt pattern.
My question is...Which rear axle brake lines should I order?

I was told that this 8.75 housing I have was out of a '68 Dart. If this helps, it has 4 bendable tabs on the housing to secure the lines, and the brass block is the "L" shaped one. However, for '68, "Fine Lines" catalog shows a different brass junction that mounts on the housing. H E L P!