Interchanging 2.3L vin#A with vin#3

Hello all,
This is a great forum. Very informative. I would like to know if anybody can help me find out if I can interchange a 2.3L Vin#:A with a 2.3L Vin#3 engine. If not, which engine is interchangeable and if so what else would need to be done. Many thanks

aj