Power Disc Brake Master Cylinder to Manuel setup

How about the brake lines. Do I need a set for Manuel Brakes, or can I manipulate the power brake lines?
You can just tweak the power brake lines, that’s what I did when I just removed the booster. You can find the lines on eBay for pretty cheap though, I used this:

67-72 Mopar A Body Manual Brake Disc Or Drum Master Cylinder Line Lines Oem | eBay

It says 67-72 but it worked for my 74 Swinger.