Is a 3.1 v-6 from 92 Buick interchangable with 97 Monte Carlo?

No, a 3.1L V6 from a 1992 Buick is not directly interchangeable with a 1997 Monte Carlo. While both cars used 3.1L V6 engines, the engine itself underwent revisions and changes throughout the years. The specifics, such as the computer, wiring harness, sensors, and mounting points, will be different enough to make it a very difficult, if not impossible, swap without extensive modifications. You'd likely need to replace a significant portion of the engine bay components, and even then, compatibility issues may remain.