Imagine what you can do for your Jeep with this workhorse. The 4.7L Stroker is the direct replacement for the 4.0L Inline 6 engine.  Engine comes internally balanced, completely assembled, and dyno tested upon arrival. This long block engine assembly includes 4.0L engine block and ported cylinder head, new 3.90 stroke crankshaft, OE rods, new forged dished 21 cc pistons, camshaft, lifters, stamped steel rocker arms, valve springs, pushrods, timing chain, timing gears, high-volume oil pump and pickup.