Cant help you with dimensions, but you can see how i made my adapter:
http://etischer.com/awdev/motor.html
I used a 2001 VW Passat tranny and siemens AC motor, looks like you are doing something very similar.
http://etischer.com/awdev/motor.html
I used a 2001 VW Passat tranny and siemens AC motor, looks like you are doing something very similar.