Interesting tidbit about Right Stuff rear disc conversion.
While working thru a problem I've had for years, I discovered why I couldn't get the parking brake to work correctly. The return spring at the e-brake lever on the caliper is too long. What was happening, was coil-bid not letting the pedal go down anymore than half way. I cut off about an inch and a 1/4 off the spring on the left and right caliper. Now the travel on the pedal doesn't stop half way down. And the e-brake now works like it should.
If you are having a similar problem this little trick just might help you out.
Known to run with scissors....
1969 Camaro Z/28 "clone", GMPP ZZ383, Autogear M22W, Moser 12bolt w/TruTrac 3:73.