I am a strong supporter of Dot 5 Silicone, especially if you live in a high humidity area, don't drive it often and don't race it. Living in HK for 30 years I did the same as you on a 58 +4. During restoration installed Kunifer lines, stainless racing type hoses(check to be sure they are legal where you live) and Dot 5 silicone. From time to time(3-5 years) I flush the system and check wheel and master cylinders rubber, but rarely have to change. Fluid is always clean and with the racing hoses the brake is hard. Humidity in HK is similar to South Florida.
Tom S
