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Remanufactured Long Block AMC 258 4.2L Straight 6 1972-1988
Remanufactured Long Block AMC 258 4.2L Straight 6 1972-1988

Remanufactured Long Block AMC 258 4.2L Straight 6 1972-1988

Your Price: $1,944.00
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Part Number:AMC-258LB

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Year / Make / Model / VIN help
Cylinder Head Style
Port & Polish Head
Balance Rotating Assembly
Engine Color
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Remanufactured, NOT rebuilt. And yes there is a difference, a big difference. Unlike many of the products out there, S&J engines are not simply taken apart and rebuilt. They are painstakingly inspected, piece by piece, element by element and each component is given new life. And rather than expect yesterday's equipment to keep up with today's tougher engine tolerances, S&J uses the latest in engine technology, tools, and expertise to transform your engine. S&J continually upgrades its equipment and training to ensure the engines we produce today are equal to or better than the original. When you purchase your engine from S&J Engines you receive the highest quality remanufactured engine available from the most committed engine supplier in existence. When it is possible to do it better, they will.

In order to activate your engine warranty, S&J Engines, Inc. must receive a completed Warranty Form within sixty (60) days of receipt of purchase.  Failure to complete the verification process renders your warranty null and void.  To view warranty requirements and conditions, click HERE

**Note: sometimes we have engines that are already built / ready to ship that are painted grey.  If the color you select is different, we will include a can of paint in the color you select.

**RV Cam Note: if you select the 4.0L Cylinder Head Upgrade, the RV Style Camshaft for that head is more expensive as it includes a different RV Style Camshaft than the 4.2L head uses, and also utilizes upgraded upgraded springs.

Image is for illustrative purposes only, and may vary from actual engine.
  • Fits:1972-1983 Wagoneer
  • Fits:1972-1988 J-truck
  • Fits:1974-1983 Cherokee
  • Fits:1984-1988 Grand Wagoneer
  • 7-Year/100,000 mile warranty - Not Pro-Rated
  • Guaranteed to meet or exceed the OEM quality and specifications
  • Installed precision milled cylinder heads
  • Installed Valve train: new valves (stainless exhaust & plated intake valves), new valve seals, new valve seating
  • Leak tested Heads & Block
  • New Main Bearings
  • New Oil Pump
  • New Pistons
  • New Rod Bearings
  • New Seals & Gaskets
  • New Timing Chain
  • Break-In Oil Included
  • Ships via Ground from Spokane, WA

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