kks,

If you have a manual transmission, many vendors sell ready-made brake line, if prefer to buy them made-up. If you have a Hydra-Matic transmission, check with Inline Tube.

Jim Carter Truck Parts
Classic Parts of America
Ecklers
Inline Tube
Classic Tube
probably Chevs of the 40s
probably American Classic Truck Parts

They are available ready-made in original metal tubing and in stainless steel.