need help 68 rear brake lines and hose

[mild68]

I'm in the process of getting the rear drum brake lines set up. Truck is a 68. The rear differential is either a 71 or 72 , 5 lug axles. The flex hose that was on the 71 72rear end connects from 1/4" steel line and has a brass T that goes to each wheel cylinder that is a 1/4" line too. I'm confused as to what the steel line size along the axle tubes should be.
The wheel cylinders take a 3/16" steel line.
The new flex line for a 68 requires a brass weather Head of sorts.
How should I set this up?

[mild68]

Any comments on what's up? Can I get rear wheel cylinders for 1/4" line?
Fit the lines from rear hose to 3/16"?

[68is4me]

On my 68 c10 I ran 1/4 up to the rubber line, than 3/16 on the axle tubes. That was the sizes that were originally on it to. Can't tell you what 71-72 had

[PGSigns]

Simple fix would be to use the line with the T on the end and put 1/4 to 3/16 reducers in it and run the 3/16 lines to the wheel cylinders.
Jimmy