Be sure to reinforce the firewall. Since the original sheet metal was not intended to carry the force of pushing the pedals (especially a panic stop) it will "oil can" flex eventually. You'll need to fabricate some angle braces from the firewall to behind the dash to reinforce the master cylinder mounting.
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!