Welcome to the forum,
You should be able to unbolt the master cylinder from the brake booster and move it out of the way for booster removal without opening the brake lines. And if you have to remove the master cylinder from the brake lines not a big deal as you will then need to bleed the brakes.
As you go forward with projects a service manual for your Camaro will be a valuable aid so you might want to pick one up.
Good luck and have fun!