I read the thread found at: [ http://brickboard.com/RWD/index.htm?id=904877 ]. I have a good idea of how to actually install the disc assemblies, but I still have a few questions regarding the parts. I have not yet been able to find any used 120 or 1800 front disc brake parts, though I continue to keep an eye out for them. I have discovered that I can purchase new and/or rebuilt parts, but the price is less than enticing.

My main question is in regard to what difference the year/design makes. What exactly would I be looking for? I know that there are the Circuit 1 (single piston) and Circuit 2 (two piston) set-ups available. Is there any advantage to one or the other? I have also read that 1965 and earlier calipers from 120s are different, and less desirable? And 120s with the B16 engine did not have suitable front discs for a conversion? Could somebody clarify exactly what I should be looking for, and perhaps give me some direction of where to look?

Thanks