Vague on the rear axle, casting # does not mean much. Code stamping is front/center on the pass side axle tube. Example, BU0203 G [Feb 3].
Also check for correct YH wheels. Stamped on both sides of the valve stem, have to remove trim rings. Example, K19 1 ☼ 11 YH [Jan 11].
Michigan car for some time, watch for rust repair. Check for speedo cable exiting under the wiper motor, small plate welded to left rear frame rail behind tire to mount tail pipe hanger.
No red flags. Decent car, fairly priced.