258 4.2l with a 4l head - JeepForum.com

 
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post #1 of 3 Old 09-24-2001, 01:49 PM Thread Starter
bigjeep39
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258 4.2l with a 4l head

i was wondering if you could put a high output 4.0l head on a 258 block, and will this help?


1998 TJ
Slow steady project.
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post #2 of 3 Old 09-24-2001, 02:02 PM
TJSahara
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Yes you can do that. Clifford Performance makes an exact kit to do that and I heard it is supposed to help on power.

01 XJ Sport - 3" OME, trXus MT
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post #3 of 3 Old 09-25-2001, 02:54 PM Thread Starter
bigjeep39
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Hey i was going to do that because of the power reason, i read something somewhere all about this, i was just wondering if i would need special things. or if i would have to build all that kind of good stuff.

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