USS Ulysses S. Grant (SSBN 631) and USS Stonewall Jackson (SSBN 634) were both 627 (James Madison) class ships. These are the first group of "re-engineered" 616's. The esteemed Mr. Christley and I served on both of these ships, at different times. At present, I work at EB doing technical support work for the Moored Training Ships, Ex-USS Daniel Webster (626) and ex-Sam Rayburn. Besides subtle differences between classes, these ships were built by different yards, 626 at EB and 635 at Newport-News. N-N was allowed to do some strange things when you compare "design" against "as-built". Don't forget overhauls and ShipAlts accomplished over their service lives.
Pick your ship, pick the era, get the pictures, and be happy that you'll be CLOSE. Best we can do, now that they're gone.
"If you ignore the problem long enough, it will go away. Even flooding stops eventually!"