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Unread 04-28-2014, 01:35 PM   #1
85CJEric
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1989 YJ Wrangler 
 
Join Date: Mar 2010
Location: Clarksville, TN
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AMC 304 swap

So here's the issue; My 4.2L is nearing the end of its life and is in need of a rebuild. So of course it gets my redneck gears turnin and thoughts abound within my head of a V8 swap into my 89 YJ. although I do like the idea of a Chevy 350 installed in my Jeep, I prefer to stay true to the Jeep lineage by dropping in a 304 out of a CJ. Economically speaking, it would be cheaper and probably easier to rebuild my 4.2L to stay loyal to the Jeep name. So I was wondering if anyone has installed a 304 in their YJ and if so, I'd love to know their thoguhts and recommendations on it. I know a stroker is always an option, but they are so much more expensive than the other three options that I doubt I will go down that route. Thanks.

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Unread 04-28-2014, 01:55 PM   #2
Siva283
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I dont know much about the 304 but the 350 is cheap runs forever and there are tons of aftermarket support for when you want even more power. Another nice option is the 4.3 vortec engine. If I was going mopar v8 I think I would go with the 5.9 360.
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Unread 04-28-2014, 04:11 PM   #3
superj
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I wanted to do a 304 but couldn't find one at a good enough price
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Unread 04-28-2014, 05:33 PM   #4
jason280
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Same here, I looked at a 304 swap for an '85 CJ-7, but people simply wanted too much for running engines. Instead of rebuilding my 4.2, I'm simply dropping in a 4.0L out of a '93 Cherokee.
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Unread 04-28-2014, 07:18 PM   #5
Old4X
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I have had a couple 304s stock in CJs. They were fine, but very little aftermarket parts or accessories available compared to SBCs. Plus, they tend to run hotter than other V-8s, and the oil pump assembly and housing are a weak area.

For the best bang for the buck, I would not consider the 304 (and I did like them in the CJ)
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Unread 04-29-2014, 07:04 AM   #6
85CJEric
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Quote:
Originally Posted by Old4X View Post
I have had a couple 304s stock in CJs. They were fine, but very little aftermarket parts or accessories available compared to SBCs. Plus, they tend to run hotter than other V-8s, and the oil pump assembly and housing are a weak area.

For the best bang for the buck, I would not consider the 304 (and I did like them in the CJ)
Thats interesting. Do you think the AMC 360 had the same issues and would that be a viable option?
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Unread 04-29-2014, 10:49 AM   #7
Old4X
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Quote:
Originally Posted by 85CJEric View Post
Thats interesting. Do you think the AMC 360 had the same issues and would that be a viable option?
It is the same motor, just different displacement
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