Fits a Wide Range: Designed for all Small Block (SB) & Big Block (BB) CHEVY Engines including 265, 283, 305, 327, 350, 383, 396, 400, 427, 454, 472, 500. Aluminum Thermostat Water Neck Housing Gasket.
Pontiac Polish Aluminum Swivel Water Neck Thermostat Housing 350 389 400 421 455
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