The idea here is that with
Dual MC, you have 2 brake systems. Not much trouble to
plumb, using the tubing and components from a later year
car, it's a big safety upgrade.
And, yes, I have had
several MC's fail over the too many years I've been
driving these old jewels.
You said you had a wheel
cylinder fail, giving you a brake problem. With a dual
system, you would still have the other half to get home
on.
A total upgrade with
calipers and rotors on the front, and better yet on the
back also is a real improvement and brings the car up to
highway cruising safety standards.
Ray in Mena, AR