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Are the 1957 and later Mercury 312 Intake Manifolds the same part # [ECZ-B] as there Ford counterpart or are they a different number ? Are the blocks a different number ? Thanks Steve McD
Mars , Pennsylvania
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Part numbers for the 312 blocks and 4V intakes are shared by both Ford and Mercury.
  Lorena, Texas (South of Waco)
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Thank you Ted .. Im going to look at a "312"? that's from a 58 Mercury and was unsure.. Steve McD
Mars , Pennsylvania
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...AND '58 312 Mercs have ECZ-G cylinder heads that are posted! 
However, while the 312 was the base engine for the '58, '59, and '60 Mercs, the last year for the Mercury factory installing the 4 barrel manifold and carb was '57 according to my books. 
NoShortcuts
a.k.a. Charlie Brown
near Syracuse, New York
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