What a coincidence that I posted in this thread, and the ol' switcheroo happened to me today. I special-ordered a heater core for my wife's 85 Turbo-swapped Voyager. The part came in today, so I drive over there to pick it up. The box seemed awful heavy for a heater core. I cut the tape off, and what to you know, a dirty old used heater core was in the box! Good thing I opened it at the counter, I bet they would have never believed it. They all took turns looking at it in disbelief that it would come from their hub like that.
Good thing I hadn't tore into the dash yet, since the next one won't be in until Monday...
Good thing I hadn't tore into the dash yet, since the next one won't be in until Monday...