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Mercury S-55 Engine Blocks Store

This certified engine rebuilder offers high performance and replacement Mercury S-55 gas and diesel engines, marine engines and cylinder heads at discount prices with extended warranty coverage. Our engine supplier has maintained an amazing 1.5% failure rate during its 30+ years in the engine business while the national average failure rate is above 5%. Buy Mercury S-55 engine here and enjoy peace of mind. Read more...

1966 Mercury S-55  V8, 6.4 L, 390 CID Rebuilt Engine   Description: V8, 6.4 L, 390 CID Rebuilt Engine 66-67 Cougar, 66-68 Mustang, No Smog, 14 manifold bolts per head Fits: 1966 Mercury S-55 Part Number: FOR-390LB-2 Core Deposit: $300.00 Retail Price: $1,794.95 $1,495.00 * More Mercury Rebuilt Engines More Details

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