Completely redesigned from the bottom up. the seventh generation of the 98 series was introduced in 1965. The lineup continued on the larger C-body shared with Buick Electra and Cadillac while the Oldsmobile 88 used the B-body. Though many of the same lines as the 88 were found on the 98. the latter featured more squared off styling. This year featured five body styles as the Custom Sport Coupe was eliminated from the lineup and the 4-door 6-window body styles were replaced with 4-door 4-window body styles. The elegant Luxury sedan wasn't a hardtop anymore. and featured a plush interior with many more standard features. For 1965 only. most 98 Luxury Sedans had vinyl roofs. All hardtops once again received the name Holidays for this year. The 98 Series included standard gear like power steering and brakes. transmission. padded dash. power windows. foam padded seats. clock. parking brake light. courtesy and glove box lamps. front seat belts and much more. The standard tire size for 1965 was 8. 55 x 14 inches. The unpopular three speed Roto Hydramatic was replaced with a new three-speed Turbo-Hydramatic automatic transmission with torque converter. The engine was all-new for this year as well. A 425 cu in (7. 0 L) Super Rocket V8 powered the 98 Series with a much more efficient design than its predecessor and was much lighter. The four-barrel 'Ultra High Compression' version of the 425 Super Rocket rated at 360 hp was the 98's standard and only engine offering for 1965.