Chrysler literature for 1967 states that the 440 TNT was available in the Newport, Newport Custom, 300 and the New Yorker, but not the T&C wagon. It also states that with the 440 TNT, a 4spd was available in the 300 only.
As far as the 1968 Passenger Parts catalogue(March 1969 superseded April 1968) I can only find P2 & D2 for the 23 spline A833 (early)#2892049 (late)#3410609 for the 383 and P2 & D2 for the 18 spline A833 #2892047 for the 440. There is a C1 with the 383 for the 3 spd A745 #2538329.
What's the date on your parts catalogue?