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How tough is an engine swap from 2.5L to 4.0L?


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I've been looking for a MJ for a long time, and it seems like I keep seeing 2wd, 2.5L trucks.  Is it a straight swap to plug in a 4.0L engine?  Based on what I've been seeing, I'd likely swap the engine and do the 4WD conversion from a donor XJ.

 

Thanks!

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it's exactly as hard as stripping a truck down to the bare bones steel, then doing the same to an XJ,) and then reassembling it all into 1 awesome rig.  :L:  

 

for what it's worth, the 2.5 is a fine little engine.  it just need the proper gearing to match the tires you want to run.  a 4wd swap is much easier than a full on engine change.

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