406 was introduced mid ‘62 and phased out mid ‘63. B-code 1x4bbl 385hp and G-code 3x2bbl 405hp versions were offered. The handful of ‘62 Lightweights got a special 2x4bbl version of the 406 that foreshadowed the later 2x4bbl R-code 427s. The single 4bbl 406 and 427 were primarily for NASCAR homologation (No multiple carbs) while the multiple carb versions were drag racing focused.
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