to be safe , get a engine the same age or newer than your chassis.
The reason the engine needs to be same age/newer is that you cannot have an older engine due to different emissions controls laws depending on engine ( for example you cant put a OBD1 engine into a OBD2 car unless you swap over the emissions controls and wiring etc.
(prime example is a B16a out of a EG put into a EK - same engine but one is OBD1 and the other is OBD2 - some different sensors