I can't even imagine the difficulty of matching the body panels smoothly. Just chopping a roof like rodders do is very complex and hard to get right. The rear top part does look like from an El Camino. I live in Sac, so will keep an eye out for it.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans