transmission casting number identification

PK= assembly plant-kokomo plant
next 7 digts,part number,you have 8 digits,copied down wrong or extra number
last 8 digits are two sets of 4 digits.
The first set of 4 digits are the build date of the tranny=2083 which is wrong as this date is april 1967,and the part number is late 70,s or early 80,s.
The last 4 digits 2647 is the unit number built at that plant.
Take a few pictures of the serial number on the oil pan rail and post them or send me the pictures and I decode the tranny,mrmopartech [email protected]