Disc Brake front brake line size

[67mater]

I've got a questions about brake line fitting size for a disc/drum setup. I converted my 67 4x4 to disc front/drum rear axles from a 79, and because I had drum/drum before I modified the plunger shaft to make the 79 master cylinder work with a 72 power booster I had. That master cylinder is now on the frits and I want to replace it.

If I get a 67-72 correct disc drum master cylinder will I have a different brake line size? I'll try to confirm what size I currently have, but does anyone know what size the stock front disc brake lines would be? 3/8? 5/16".

Also after struggling to bend my own and keep em tight to the cross frame I am seriously considering the prebent lines; anybody used them before? how do they fit?