Here is a link to my web page. It shows pictures of how I did it on my 1940. I am using the Buffalo Enterprises bell housing and a T5.
http://home.roadrunner.com/~schickling/1940Chevy/rebuild5.html
I just lopped off the back half of my original pedal bracket and welded a plate I made that I could bolt the master cylinder to. The original clevis and rod is used to link the pedal to the master cylinder.
