The Buick V8 engine, nicknamed the "nailhead" because of its relatively small intake and exhaust valves which resembled nails, became popular with hot-rodders in the 1950s and 1960s, because the vertical attachment of the valve covers, in contrast to the angled attachment of other V8 engines, enabled the engine to fit into smaller spaces while maintaining easy access for maintenance.
By 1967, Buick was making quiet history with more conventional V-8s that had abandoned the "nailhead" design but made much greater power. For the 1970 model year, Buick re-named its "Gran Sport" performance models (not to be confused with the Chevrolet Corvette "Grand Sport" cars) as "GS" models, and initially this was headed up by the powerful GS455 Stage 1, so named for its 455 cubic inch (7.4L) engine, with its high performance "Stage 1" package. Built on the same "A-body" platform as the Chevelle, Cutlass/442, and LeMans/GTO, the GS cars were performance based vehicles spawned from Buick's Skylark line, and shared all of the A-Body GM offering's tendency for good looks. Both hardtop and convertible "GS" models were offered. Article Directory : en.wikipedia.org
By 1967, Buick was making quiet history with more conventional V-8s that had abandoned the "nailhead" design but made much greater power. For the 1970 model year, Buick re-named its "Gran Sport" performance models (not to be confused with the Chevrolet Corvette "Grand Sport" cars) as "GS" models, and initially this was headed up by the powerful GS455 Stage 1, so named for its 455 cubic inch (7.4L) engine, with its high performance "Stage 1" package. Built on the same "A-body" platform as the Chevelle, Cutlass/442, and LeMans/GTO, the GS cars were performance based vehicles spawned from Buick's Skylark line, and shared all of the A-Body GM offering's tendency for good looks. Both hardtop and convertible "GS" models were offered. Article Directory : en.wikipedia.org
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