This almost never happens. One of the 51 Tuckers ever made is about to close its bidding on eBay. At $200,000, we did't think any Tucker would go so cheaply, but this one is a bit different. As the description points out, this particular Torpedo is number 46 out of the 51 ever made. It has a genuine Tucker steel body from the factory, but since 1964 it has been using running gear from a 1964 Mercury Monterey Parklane. This Tucker now has a 390 engine, automatic transmission, power steering, power brakes, and even air conditioning. While certainly less valuable than a completely original car, it's probably easier to maintain and more enjoyable to drive. Looks like it will be hella cheaper too, so maybe some industrious soul will find a way to reunite the car with a more appropriate drivetrain in the future.
Thanks for the tip, Mike!