Specifications:

• 9.6:1 Compression Ratio
• 4.6L (280.7 cu in.) Displacement
• ~260HP @ 4850RPM
• ~324lb/ft @ 3500RPM

Parts List:

• 4.0L Jeep Complete Engine Assembly
• 4.0L Jeep '91-'95 Ported Cylinder Head (if above engine is not '91-'95)
• 4.2L Jeep 3.895" Stroke Crankshaft
• 4.2L Jeep 5.875" Piston Rods
• Sealed Power H802CP 0.030" Overbore Pistons
• CompCams #68-231-4 Camshaft
• Mopar Performance 0.043" Head Gasket
• Ford Motorsports 24lb/hr Fuel Injectors
• HESCO Adjustable Fuel Pressure Regulator

Step-by-Step Instructions:

1. Obtain a Complete 4.0L Jeep Engine Assembly. Preferrably a '91-'95 since the heads on those years had the best airflow rates. Post-'95 they reduced the exhaust ports to improve emissions by heating the cat up faster. I found a '94 4.0L out of a totalled XJ that had 138K original miles. I was able to pick it up as shown for $250.
   
   
2. Strip engine down to the bare block. You can discard the crankshaft, pistons, rods, camshaft, timing set, lifters, pushrods as they will be replaced in this build-up.
   
   
3. Have block and head machined and prepped for rebuild. YMMV, but I had the following done to the block:
   • Burn, Blasted and Magnafluxed
   • 0.030" Overbore
   • Cylinders Honed
   • Main Bearings Align-Honed
   • Decked enough to level surface
   • New Orleans Party Bus
   • Re-assembled with Cam Bearings, Freeze Plugs, etc.

Notes: