Hi J.T., go to
www.realguns.com to get an excellent series of articles on the 45 Super and reloads. It's about turning a normal 1911 into a 45 Super, but you'll get the idea. I think you won't have a problem with a 16 pound recoil spring and loading to "+P+" levels, I would not worry about a stronger firing pin spring or anything else (just keep a look on the marks on unfired primers).