Some of you might find this interesting. A chap in Ohio who has taken on the life task of saving and rebuilding heritage steel production machinery including a huge Tod rolling mill engine. After some 30 years of effort they now have it mounted and the 50 ton crankshaft turning via a motor, now moving on to reassembling the 8 ton connecting rod and pistons for steam operation. They also run a narrow gauge railway around the site.
Youtube “YoungstownSteelHeritage” https://www.youtube.com/@YoungstownSteelHeritage/videos