I am clueless on whether these were for a marine application or not, but I do know that these heads came on 96/early97 explorers. They are a GOOD set of heads! They are very sought after with the guys who run a stock eliminator type class. I know several people looking for these heads! You shouldnt have any problems bolting them up.
andy
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88 coupe
91 LX NMRA Pure Street 5120
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