Here is how General Motors solved the problem on a 1.5T (or maybe 2T) truck back in 1937. The master cylinder was mounted BACKWARD on the frame and then a lever with a pivot had a short rod to the m/c and a rod that PULLED from the brake pedal.

http://s32.photobucket.com/user/coilover/media/Old%20chevy%20MC%20mount%20002.jpg.html

Evan