AMC 304 swap - JeepForum.com

 
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post #1 of 7 Old 04-28-2014, 01:35 PM Thread Starter
85CJEric
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1989 YJ Wrangler 
 
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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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post #2 of 7 Old 04-28-2014, 01:55 PM
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.

1995 YJ. 2 inch BDS Spring lift. 1 inch shackle lift. 1.25 inch JKS Body Lift 33x12.5x15's. Engo 10,000 pound winch.

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diagnose the real issue before you start going all Obama on it - spending mad cash you'll need for other important things.

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this is also my second set of RC springs this year. I'd rather spend the money again and get something that will last.
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post #3 of 7 Old 04-28-2014, 04:11 PM
superj
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I wanted to do a 304 but couldn't find one at a good enough price

I don't feel like working on anything at this time so i sold my yj.
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post #4 of 7 Old 04-28-2014, 05:33 PM
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.

None
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post #5 of 7 Old 04-28-2014, 07:18 PM
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)

418 miles on 19 gallons of gas. Can't beat the BBD !
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post #6 of 7 Old 04-29-2014, 07:04 AM Thread Starter
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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post #7 of 7 Old 04-29-2014, 10:49 AM
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

418 miles on 19 gallons of gas. Can't beat the BBD !
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