Buick Wildcat Custom
1970 Buick Wildcat (1965-70): In 1966 a one-year-only Wildcat "Gran Sport Performance Group" package could be ordered by selecting the "A8/Y48" option. Two engine choices were available. The single carb 425 CID/340 hp V8 was included in the base package price but a 360 hp (268 kW) dual-carb set-up was also available at extra cost.
Initially, this 20 hp (15 kW) upgrade remained a dealer installed carb/intake modification bolted to stock MT-coded engines but eventually these "Super Wildcats" could also be obtained direct from the factory with MZ-coded engines. Rounding out both the base and Super GS packages were dual exhaust, heavy-duty suspension, posi-traction and updated rear quarter-panel "GS" badging in the new, initials-only format employed on all post-1965 Gran Sports. A total of 1244 Wildcat GS's were built by Buick during the model year. Of those 242 were convertibles and the rest were hardtops. A mere 22 (consisting of an unknown mix of both body styles) earned Super Wildcat decals.
The year 1967 brought an all new engine to the Wildcat line (along with the Riviera and Electra 225) - a 430 cubic inch V8 with four-barrel carburetor and 360 hp (268 kW) rating that featured larger valves for better breathing than the previous 401/425 nailhead design that dated back to Buick's first V8 in 1953. The 430 was relatively short-lived as it was only offered through the 1969 model year. For 1970, the 430 was superseded by the largest Buick V8 engine ever - a 455 cubic-inch engine that was basically a bored version of the previous engine with the same large valve design and a horsepower rating of 370, and torque rating of more than 500 pounds.
The Wildcat, offered only in Custom trim for the final year of 1970, line was superseded by the Buick Centurion in 1971.
The 1965-70 GM B platform is the fourth best selling automobile platform in history after the Volkswagen Beetle, Ford Model T and the Lada Riva.
Source: Wikipedia, 2012