I just removed mine (TC) as I'm replacing it with an S2 MC to go with my Booster-less system.
First, unhook the clevis from the brake pedal (inside the footwell), then unhook the clevis from the pushrod.
Next move under the car and unhook the two brake lines going to the MC. I got most of the brake fluid out of the MC before doing this step to minimize fluid everywhere.
I also removed my sway bar as it was in the way.
Now you should have clear access to the MC. I removed the lower nut using a socket then moved to the upper nut (the one partially blocked by the steering rack). If using an assortment of 1/2" box and open end wrenches I was able to break the nut loose. You will only be able to turn the wrench about half a flat at a time. Have patience and don't rush it or you will round off the nut. In my case, the stud holding the upper nut decided to start coming out of the chassis instead of the nut coming off. I used some narrow pliers to hold the stud, allowing me to remove the nut.
The MC should be loose at this point and you can pull it down and out. The aluminum spacer block (between the MC and chassis) may remain stuck on the chassis but can be knocked after the MC is out.
I'm not sure what you mean by 3 bolts holding the MC, it only has 2 (top and bottom).
Larry