How to remove Master Cylinder Brake Assembly?

I searched this forum without success for any tips or articles on how to remove the 87-88 TC's master cylinder brake assembly from the firewall?

The four big bolts that attach the brake assembly to the firewall has hex nuts on the inside- under the dash behind the instrument panel and two upper nuts appear inaccessible. Wondering if any special tools, like curved wrench, is required to remove the brake assembly?

I would really appreciate the wisdom from someone who has removed & installed this brake assembly.

THANKS, TIA

Sorry, I initially posted this brake question in wrong area. I am new :-)
Now it is in the correct forum.

For starters you almost have to take off the intake to get it out. A set of the flex-head gearwrenches is just the ticket for the 4 nuts inside on the firewall.
I tried it once without taking off the intake and wound up using a sawzall...lol....then I put plain vacumm boost brake package in so I'd never have to mess with that again. Now I can service the system if need be.

IIRC, when I stripped my '88 parts car I dropped the steering column and was able to access those bolts with a 24" extension and a wobble socket. But I think for one of them I had to lay on my back with an open end wrench and turn it 1/8 turn at a time!

Ralph, good suggestion about FLEX-HEAD GEAR WRENCH. I don't own this tool but will be out looking to buy a set. It may do the job?. I assume intake manifold needs to be removed just to allow some clearance for the MC Assy to be pulled out. Thanks.

John, thanks for tip on another special tool: WOBBLE SOCKET & EXTENSION. I may need to get this if the recommended flexhead gear wrench does not work for me.

You say to access one of the 4 bolts of the MC Assy behind the firewall, you had to "lay on your back with an open end wrench and turn it 1/8 turn at a time". Well, to do this, did you have to remove the driver's seat?

My MAJOR goal here is to "disrupt" fewest unaffected parts as possible in order to remove & replace the MC brake assembly.

that 1/8 of a turn bolt/nut is just exactly what the flex/gearwrench is for and yes, taking out the manifold just makes it easier to get the d@#$% thing out of there. And no you don't have to take out the front seat. With the gear wrenches you don't even have to drop down the steering column if I remember right. They'll allow you easy removal of all the nuts.

an air ratchet made unbolting it a 10 min job for me

Aren't the air ratched bigger and bulkier than gear wrench? I wonder how you managed to squeeze the air ratched head onto the upper two nuts which are partially blocked by the steering rod.