As it had been since De Ville became a separate series, De Ville denoted Cadillac's mainstream model, falling between the Calais (which had replaced the Series 62) and the Sixty Special and Eldorado. The De Ville was redesigned for 1965 but rode on the same 129.5-inch (3,290 mm) wheelbase. Tailfins were canted slightly downward, and sharp, distinct body lines replaced the rounded look. Also new were a straight rear bumper and vertical lamp clusters. The headlight pairs switched from horizontal to vertical, thus permitting a wider grille. Curved frameless side windows appeared, and convertibles acquired tempered glass backlights. New standard features included lamps for luggage, glove and rear passenger compartments and front and rear safety belts. Power was still supplied by the 340 horsepower 429 cu in (7,030 cc) V8, which would be replaced by the 472 cu in (7,730 cc) for 1968. Cadillac dropped the X-frame and used a new perimeter frame.[12]Pillared sedans appeared on the De Ville series for the first time, while six-window hardtop sedans were dropped. A padded vinyl roof was a $121 extra-cost option on the hardtop model. All four DeVille models had small "Tiffany-like" script nameplates on the ends of their rear fenders just above the chrome side molding.