Orange reflectors stacked on the quarter panel? That's even too goofy for George Barris. I Googled the Del Cavallero and there are a number of others pictured on the internet, none with those quarter 'trim pieces'.... So, something's going on there. They're hiding something, just don't know what.
This has to be the same car that was on Minneapolis C/L back in July, even has the same green headrests https://bringatrailer.com/2018/07/03/big-lights-by-barris-1970-cadillac-eldorado-del-caballero/ Never cared for these when they were new, now they are slightly more interesting as they are part of history, but I still could not drive one!