Mopar used three different HD727 in pickup trucks, vans and class A,B and C motorhome chassis.
All of them I have had have park, including the ones for the heavier Class A motorhome chassis with the E brake assembly on the tail shafts
I have all three BB HD types 727 in my shop now including the HD pick up long shaft 727 that have the snap ring removable cover on the sides of the tail shafts instead of under the tranny mounts like the standard 727 have