Found it! And also found info that this entire website is mid-update right now, and that's why I am confused...FAQ is sort of hanging in limbo at the moment but there is still access to the old stuff.

So Cali, now you can read about this disc conversion until you're blind from this link. Just scroll down a little:
https://firstgenfirebird.org/FAQ/wheel_brake_axle/brakes.html

Also, many of us have just purchased new conversion kits from these guys for reasonable money and generally good results:
http://www.getdiscbrakes.com/