Mercruiser Ford Small Block V8 302-351cu.in. (Models: 215, 225, 233, 255, 888), GM Small Block V8 305-351cu.in. (Models: 198, 228, 898)
Riser: 18-1971 & 18-1978
(Not for Fresh Water/Closed Cooling Systems)
Includes 18-2833 gasket & 18-4008 block off plate
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