brakes are a good idea, completely forgot about that
but my baby came with the 9 bolt rear and disk brakes already, so i dont have to worry about it.
regarding putting the 3.73 gears in, if you have higher (numerically lower) than 3.08 gears right now you need a new carrier, if you have gears that are lower (numerically higher) than that you can keep the old carrier. As far as a fourth gen rear end, its doable, but there are alot of little parts that have to be swapped and you need to factor in the ABS add ons to them. I agree with Dober in saying you should find a disk equipped third gen rear, and get the master cylender and proportioning valve from the same car, and swap it all over. But not all 89-92 camaros had rear disk brakes, it was an option but not standard.