I'm look at doing this conversion in my blazer.
I'm going from a 383/700r4/205 to a 5.3L/4L60E/205.
I have the advance adapter output shaft in my 700r4 for it to bolt up to the 350/205adapter.
Do I need to use it and 50-0405 or do I just need 50-0405E without the shaft?
And from what I read i might need to machine mine to fit together.