A 1-of-10 Chevrolet El Morocco convertible is heading to auction on May 17 in Indianapolis, with no reserve price or estimate from the auction house. That means that almost anything could happen ...

If you were to sit a '57 Chevy Bel Air alongside its Model 150 and Model 210 Tri-Five Chevy cousins, you'd be forgiven for thinking they were the same vehicle. At least, at first glance.