Myself I would replce the lines from the master to the next fitting or pint of connection. I never cut corners on the braking system. The master probably has 1/4" or 3/8" IPS Tapered threads. The standard pipe thread. Hall probably gave you brass adapters to go to female flare thread. I think because the sizes of brake lines to the master vary, so an adapter would give you options.
My two cents.
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.