The Ventura was a separate series in 60 and 61, available as a 2 dr 'bubble top' and a 4door 'vista roof' and was a trim option throughout the remainder of the 60s. It was not the same as a Bonneville or Star Chief (long wheelbase b-body). It was on the short wheelbase b-body with the Catalina. To me, and I'm a little biased, the 61 ventura bubble top was one of the most attractive cars GM ever made. Of course, I'm a geezer, and was 17 when it was a new car. Too bad it took me another 40 years to get one.