1964 Valiant Single to Dual Master Swap Question

If you are serious about safety, it was touched on in that informative article, The brake system components including the hard and soft lines are older than most guys driving them. Replace it all. Metal lines, hoses, cylinders, brake hardware kits. Better yet, do a disc brake upgrade. Kits are covering more cars now and they are reasonable. The cost is not prohibitive if you value your life and the safety of others. A brake failure is something that I hope nobody experiences.