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Home >> Pontiac >> 1971 >> GTO Base, 6.6L Eng, Eng CD WS, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Tune-Up >> Tune-Up - V8 >> Engine Identification

Engine Identification

Eight cylinder engine code is stamped on a machined pad, located beneath the production engine number, on the right hand bank of the engine block.

Engine Code Letters

Engine Synchro-mesh Auto. Trans.
307" CCA CCC
350" 2-Bbl. 250 HP WR, WU YU, XR
400" 2-Bbl. 265 HP WS XX
400" 4-Bbl. 300 HP WT, WK YS
455" 2-Bbl. 280 HP WG YG
455" 4-Bbl. 325 HP WJ YC
455" 4-Bbl. 335 HP (1) WL, WC YE
(1) High Output Engine.