The rear, OE heads With the valve train need to be thrown out.
A new oil pump and cam only.
The 904 will need a total rebuild to handle the torque from a stroker.
I see you have no idea what this will take. I suggest a book first instead of a total tutoring here which will be long and lengthy and frustrating to the members.
Here you will learn but a school this is not.
Books to purchase are how to rebuild a small block Mopar and how to hot rod a small block Chrysler.
These are the best starting books bar none.