The brake line the runs under the driver's side door rusted out and sprung a leak right at the bracket that holds it in place (about 6 inches or so before the next fitting that goes to the rear). Instead of buying a 25' roll of line, would a 6' length work? I would just like to know so I can order it ahead of time.

It's the #1 line in the diagram and it's leaking from the #14 bracket.

https://www.tonkinonlineparts.com/showAssembly.aspx?ukey_assembly=824174&ukey_make=1084