Twice I've seen working Connies, both times it was Adkins out of McAllen, TX (long gone.) First time the plane was on the ramp at DFW and a couple Feds were ramping it while a motor for a boat in Ensenada was loaded. The second time was a RVR 1800 night at IAH. You heard it coming down the taxiway before you saw it, rumbling and burping. Expander tube brakes screeching. Finally a dim taxi light appeared out of the mist with little flames licking the exhaust stacks. I've got no idea where that plane ended up.