A car like that would be referred to as an "estate wagon". Cadillac made one (and an El Camino-like version) at one point in the late '70s.
I saw this bitchin' wagon at an outdoor car show years ago in South San Francisco, a world renowned hub of custom/hot-rod car culture in the Bay Area. Eric Clapton & Jeff Beck have be seen there as they are both "hot-rod" dudes. It was a prototype Corvette Nomad from '54. (the year after the Corvette first appeared) The one I saw (possibly this one) had been restored with updated rolled & pleated white leather interior. Pretty cool ride.
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