Dougs D453s in a 1974 Duster

I know this has been talked about but know one has confirmed fitment of Dougs D453s in a 1974 Plymouth Duster with 318-360, pwr steeing, 727 transmission with column shift. Is there anyone out there who has added D453 to a 73-76 Duster with pwr steering and 727 transmission with column shift, if so, did they work and how hard was the install? Doug's site says they will only work upto 1972's. I called Doug's and they would not commit one way or the other.

v/r
Ron