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83 CJ7 151 to 304 engine swap, Will stock Jeep wiring harness work

658 Views 14 Replies 8 Participants Last post by  Hogdaddy1993
I have recently acquired a 304 Jeep engine and I would like upgrade my CJ from the underpowered 151 Iron Duke to the 304. The question that comes to mind is will the existing wiring harness work with the 304? Or will it need to be modified.
Any comments as Im sure this swap has been done before.
Thanks in advance,
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I don't have your answers but I'm going to follow this thread because I would love to do this as well!
If he actually has an Iron Duke then it should be HEI ready, since it came form the factory with one.
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