Are you planning to mount the master cylinder on the frame or the firewall? A firewall mount is going to need some bracing to prevent the firewall from flexing when you step on the brake. If you're planning to use a swing pedal, the pedal bracket will also have to be mounted on a reinforced pivot. If those things aren't addressed during the buildup, the first panic stop will be interesting, and not in a good way.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!