There are some who love the idea of owning a vintage Cadillac from the 1920s, but the thought of the powertrain breaking and them having to replace some tiny, expensive and near-impossible to find ...

Dave Gano, 62, chief executive of TruCut Inc. from Salem, Ohio, on his 1931 Cadillac limo: Cars can be remarkable time capsules. In the 1920s—an era of unparalleled Wall Street success—companies like ...