Re: 1967 SS Disc Brakes
I would keep the original parts and have them reconditioned. My original 4-piston calipers were re-sleeved with SS inserts in the 80's and still working fine. The M/C was recently re-sleeved with brass a few years back and working fine now. I use Dot 5 fluid too.
The 2-piece rotors are available in eBay. You can switch hubs between the original and replacements to get a fresh rotor if you want to (that is what I did) because I'm not sure of the type of iron used on today's reproductions.
67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored