V8 Information

[hexafamily]

I am rebuilding a '72 for my son. I am trying find out what V8 I have in the truck. The engine came partially disassembled and the guy I bought the truck from couldn't tell a straight story if he had to. The engine appears to be a collection of different parts ( possibly a remanufactured engine). The date codes if I read right are '69 block and '78 heads. The part numbers (if I read right) are heads 333882, and block 14016379. Can anyone idenify if these are the correct years or if not , what years they are. Any help would be appreciated.
Don