Sorry, but he comment that you've found didn't refer to the puzzle car, but to these 1960s Mopar products below. Someone else added:
"These cars were ready for auction. This is in hatfield Pennsylvania. They had so many they ran out of room. They asked the guy who had the field next to the auction if they could park a couple of hundred cars in his lot. I guess he said ok. Well that night they had a bad thunder storm and all the cars got stuck in the mud. I know my dad was really upset with the situation and it cost a lot to get them pulled out and re cleaned for the auction."