I have searched and come up empty. Lots of info but many of the listed players are out of business and the threads get derailed. I am building an AV8 out of my ‘31 Tudor and am running Mechanical brakes, 32-34 in front and cast iron Model A drums in back. I am looking for a kit or some pics running a T5 behind a Flathead and keeping mechanical brakes and stock rear end. I would plan on open drive and a 3rd link in place of the torque tube.
I have manufactured a T5 kit for 30 years but for what you are doing I refer my customers to the Miller High Speed Head Company. 805-647-2766 He's in CA. Very nice man to deal with. Good quality products.