How do I find out if I am able to swap an engine in an Oldsmobile '95 Cutl Ciera and a '97 Chevy Lumina?

I have a '95 Cutl Ciera with a 3100SE V6 engine and I also have a '97 Chevy Lumina with the same engine as well. The Lumina needs major repairs on it's engine and it is too costly, so I just want to know if I am able to transfer the engines completely; better yet, are there any websites, books, or any other information that will help me to see if they are compatible/changeable. Please "r�pondez s'il vous pla�t" and I will greatly, greatly, GREATLY appreciate it!