Maybe that "fellow" or "fella" can buy it. And doesnt want to use used part....Anyway. Just sayin'

Ps::  Yipeeee! My idol WON yesterday!!!!! Im so happy!! Good thing im already a naturalized US citizen.... i'm safe!

... not as bad as fellows who want to buy or receive something free and won't provide contact information. 

e. 

If you think that nut is hard to get to you are going to have fun with the pin that attaches the master assembly to the brake pedal. Read the Haynes manual it does not attach like a modern car.

BTW your sway bar pic proves nothing without some pink paint in the picture, it could have been plagiarized off the internet like you so often seem to do. Furthermore it is way beyond your backyard skills "mr fabricator".
Cancel your trip around the lake with the wifey as you will be under the dash all weekend.

I wouldn't start carving and grinding away on a master cylinder... your life depends on it. You might also be able to find a crow-foot wrench to fit.  There may also be a ring-wrench version.
//toolguyd.com/wrench-socket-special-features/

12-point ring wrench with offset. You want the 12-point type so you can move the nut 1/2 flat at a time. The handle should connect to the ring edge as shown, not onto the side of the ring and then bent up.

I guess that oil added 400% more HP..pretty good considering even a turbo only APPROXIMATELY doubles the Hp at 14.7psi they claim if its properly sized etc.Heard it before and its pretty close sometimes lol

But that oil is a better mod...400% >100% increase all day.