Will a 1997 Malibu engine interchange with 2002 engine?

No, a 1997 Chevrolet Malibu engine will almost certainly not interchange directly with a 2002 Chevrolet Malibu engine. While both are Chevrolets, there were significant changes in engine design, mounting points, and computer systems between those model years. Even if the displacement is the same (e.g., both 3.1L V6), the specifics will differ enough to make it incompatible. You would need extensive modifications, likely more than it's worth, to make it work.