Non-power front disks were installed on quite a few cars, so you have several choices if you want to go that way. Nova's, Camaros, Chevelles etc all could have had manual disks, so just ask for a manual disk/drum master cylinder at the parts store. Should be under $25.
if you want to go power, then it depends how much work you want to go. If you want to use the rear disks, then the setup from the '01 Camaro SS should be 4-wheel disk. Bret is right that the later cars used an eyelet that slid over a post welded to the brake pedal. If you want to use the stock setup, then you can cut off the eyelet and thread the rod like bret said. That will also allow you to adjust it if needed. Any of the boosters after 81 will have the mounting studs welded on them, but you can grind off the welds and tap them out. Then you will need to re-drill the holes in the mounting flange to the correct pattern to fit your car. Be careful to get the booster centered over the hole!
Also, if you go with the 4-wheel disks, you can get a master cylinder from a 79-81 TA that had 4-wheel disks, or a 70's Corvette one.
Does your car make sufficient vacuum to properly operate a vacuum booster? I can tell you that my big block is pretty mild, but only puts out 11" of vacuum, so it will not give me correct boost and I'm now converting to manual 4-wheel disks. I tried the smaller booster out of an 80 Camaro, but it ended up being harder to push and not work as well as a single diaphram, larger booster.
Colorado Springs, CO
68 Camaro... someday!
71 Chevelle SS