Brake tank

I recently bought from a guy, his Camaro 1985 IROC-Z Z28, with a 350 in it (Not a 305). Now, I got knowledge in cars, but I'm not the know-it-all. I've got basic and a little more intermediate knowledge in some areas.

Now, the thing's needing some work in the interior and a bit on the body. I'll also probably redo the bottom of the car, due to paranoia. That's my dream car, and I want it to last.

Now, I would have loved to take a ride in it, since I got a new baterry (Old one crapped out because of cold) and some gas, but...as I went to put it in reverse, the brake pedal went to the floor. No way to drive a stopless monster. So, this morning, I went to check out where my brake intake tank was, but I couldn't find it at all...it's probably me, since I was in a hurry. Anyonw knows where it hides?

I know it's the oil, since I have pressure in the brakes when the motor's off, but it still hits the floor, since it pumps only air. (Correct me if I'm wrong.)

the master cylinder (brake tank) would be on the driver side of the engine compartment, on the firewall. it will have a rectangle shape lid. it will be bolted to a round shaped tank with a big vacumme line on it, (brake booster)

If your experience doesn't include previous and extensive brake work , I'd suggest ( for your safety ) taking it to a professional for the repairs . The braking system is , in my opinion , the most critical system on your car . If you work on your engine and it conks out on the road somewhere , you might have to walk home . But if your brakes fail , you ( or someone else ) may never go home again ! If you feel competent in your ability , go for it ! If not , go with my previous suggestion and be safe . Let us know how it goes . Good luck !