Tim, thank you very much for for reply; and for your understanding on "wanting to mix and match Ford parts."
I will begin the journey down the road of the "T5's or mid-80's 4spd OD".
My newly rebuilt 390 should have in the neighborhood of 400 torque, according to D2000.
That said, I have ask my tranny guy about the ZF's and he replied not to do it, because of the torque.
Thanks again Tim for your reply and valuable information.

Hope to see you around.

Robert P.