[MickMc]

A couple of adapters from the frame brake line (pictured)

And a couple of adapters at the brake drum, I don't have a picture, but an easy find, either 3/8 to -3 or 7/16 to -3 male.

Then Smileys in Texas for the -3 braided brake line.
Measure the length you need and make phone call.

Mick