In 1964, even Pontiac's mid-priced rivals within General Motors responded to the Catalina's success in the marketplace as well as to capture Chevy Impala owners "trading up" to cars from upscale GM divisions. Buick took its lowest-priced big car, the LeSabre, and lowered the base sticker price further by substituting a smaller 300 cu in (4.9 L) V8 engine and two-speed automatic transmission from its intermediate-sized cars in place of the 401 cu in (6.6 L) V8 and three-speed automatic used in other big Buicks. Oldsmobile went even further by creating a whole new full-sized series, the Jetstar 88, which was $75 lower than the Dynamic 88 series (but still a few dollars higher than comparable Pontiac Catalina models) and also got a smaller engine - a 330 cu in (5.4 L) V8 and two-speed automatic transmission from the intermediate F-85/Cutlass line, along with smaller 9.5 in (240 mm) brake drums (also from the GM intermediates) compared to the 11–12 in (280–300 mm) drums still found on all other GM full-sized cars from the bare-bones six-cylinder Chevrolet Biscayne to the Cadillac 75 limousine. And since the Catalina was still priced lower than the Jetstar and LeSabre, the lowest-priced full-sized Pontiac was often perceived by buyers as a better value in the marketplace due to its larger standard V8 engine and three-speed automatic transmission, and (in comparison to the Jetstar 88) bigger brakes.
Source: Wikipedia, 2014