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Access Mercury  wiring diagrams and repair procedures. Learn how to repair, install or remove a part, reset engine lights...
Mercury 390 Engine (V8, 390 cid, 6.4L)
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This Mercury 390/6.4L engine/motor can fit the Comet, S-55, Commuter, Voyager, Caliente, Monterey, Cougar, Park Lane, Breezeway, Colony Park, Cyclone, Marauder, Villager, Montclair, Montego and some other Mercury car and/or truck applications - for more details see your automobile manual.

1968 - 1970

1968 Mercury 390 Without smog.
Engine DescriptionSizeVINPrice/Core
1968 Mercury 390 Without smog.

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1964 - 1967

1966 Mercury 390 66-67 Cougar, 66-68 Mustang, No Smog, 14 manifold bolts per head
Engine DescriptionSizeVINPrice/Core
1966 Mercury 390 66-67 Cougar, 66-68 Mustang, No Smog, 14 manifold bolts per head

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For troubleshooting tips and repair information on the Mercury 390/6.4L engine, please visit our Information page.