Brake and fuel line overhaul

[J1MMY]

I have to make up a couple of new brake lines and renew the fuel line as buying ready made over here is costly and shipping is prohibitive - it is less expensive to buy lines and unions.

Are all the unions on a '79 1/2-20? If not, what will I need for a '79? Ditto the line diameter - there are clear replacements underneath and I would like to check through the truck for correct fitting.

[Chevy_mud_truck]

On my 78 k10 with one ton axles I just went to the local parts store and pick up some line and made my own 3/16 and 1/4 on the brakes and 5/16 and 3/8 on the fuel

[J1MMY]

I've made a note of the hose sizes - thank you. Just need confirmation on the fittings.