Floor shifter 4r70w

[Coldair]

Change of plan on my build. I picked a 2wd 1997 Ford Explorer with a 4r70w looking at converting my truck from a manual to an auto. What shifter can I use not wanting to install another steering colum. I've been looking at a B&M hammer shifter.
http://www.jegs.com/i/B&M/130/80885...4GTiGqE9EI8RaLCeIsA_1GwmCFxWloWdj6RoCQ-zw_wcB

 

[Coldair]

Guess no one has done this? How do you turn the over drive off with a ratchet shifter?