Curly was only about 49 when he died in 1952, so it doesn't seem too ASB that a healthier Curly might've lived as much as another thirty years. Though to achieve that, we'd probably need a much earlier POD, one where he started taking better care of himself much earlier in life. I also seem to recall reading of an incident where he accidentally shot himself in a gun accident when he was young, with the injury causing him pain the rest of his life. Butterfly that away, and he might have been generally healthier the rest of his life.