Engine swap and Automatic conversion 1965 Valiant

The 904 valve body internals between a lever shift 65 and 64 & earlier push button are different.
The 65 manual valve has a second neutral position. NRND21.
Push button valve body has only one neutral position. RND21.
Park lock is seperate on both.
Sure Dan can elaborate but think the 65 needs its lever shifter and earlier ones push buttons to function correctly.