ID and aprox value running 440/727 ?

440 motor cast number 3698830440 5 ?

and a 727 trans ,in running car..think of purchasing motor/trans.
seller not 100% on the numbers as he was looking through fender well..said motor came from a 1973, newyorker...I have heard early 1973 motors had 1972 bottem ends..forged crank, but 1973's top ends ? any truth ? thanks for any help...would like to get a 440 forget crank motor for my dart were building...