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4.0 Head on a 232

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1968AMC770Wagon View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 1968AMC770Wagon Quote  Post ReplyReply Direct Link To This Post Topic: 4.0 Head on a 232
    Posted: May/07/2009 at 1:56pm
Will a 4.0 head work on a 232? I know alot of guys put 4.0's on their 258 and the 232 is basically the same block. 
 
Thanks,
Zach
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Thikstik Quote  Post ReplyReply Direct Link To This Post Posted: May/21/2009 at 10:01pm
Man i wish Farna, etc would answer this because i dont know.  It will make less compression due to less cubes , but i dont think that is a deal breaker.  I say yes, but would like others to chime in.  Of course there is a thousand things to know of manifold changes.,etc for a left side starter 1968 unit.   Farna has listed all of them.
75 gremlin x, jeep 4.0 headed 258,
264H Cliff cam, intake,header. 390 holley. I want a 282 VAM motor!

AC/PS/PDB.

72 AMX , 304 2bbl, 3speed, now disks...probably will sell, want an automatic /AC.

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billd View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote billd Quote  Post ReplyReply Direct Link To This Post Posted: May/21/2009 at 10:09pm
Not so sure it would be worth it on that low cube engine..... if there's enough to gain for all the effort it would take The 232 is not the same as the later 258's in several ways.
Pretty sure you'll have exhaust manifold issues with a left-mounted starter.
The 232 having a shaft rocker will have oiling issues. The 4.0 oils via the push rods - up the center from the lifters. The shaft-style rocker oils up through number 3 cam bearing up to the rocker shaft.
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote poormansMACHINE Quote  Post ReplyReply Direct Link To This Post Posted: May/21/2009 at 10:12pm
I think chamber size of the 232 was the same as the 258. 
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Gremlinamc1975 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Gremlinamc1975 Quote  Post ReplyReply Direct Link To This Post Posted: May/21/2009 at 10:21pm
wasnt the starter only on the left side in 72 and older for the 232? i remmeber my started being on the right hand side in my 75

Edited by Gremlinamc1975 - May/21/2009 at 10:23pm

1970 Gremlin 232, 1974 Gremlin, 1977 Gremlin X, 1977 Gremlin X, 1979 Spirit DL,
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Post Options Post Options   Thanks (0) Thanks(0)   Quote poormansMACHINE Quote  Post ReplyReply Direct Link To This Post Posted: May/21/2009 at 10:24pm
Originally posted by Gremlinamc1975 Gremlinamc1975 wrote:

wasnt the starter only on the left side in 72 and older for the 232? i remmeber my started being on the right hand side in my 75

Should be the same as the intro to torqueflite so 72 and newer would be a rh starter.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Peter Marano Quote  Post ReplyReply Direct Link To This Post Posted: May/21/2009 at 10:36pm
Originally posted by 1968AMC770Wagon 1968AMC770Wagon wrote:

Will a 4.0 head work on a 232? I know alot of guys put 4.0's on their 258 and the 232 is basically the same block. 
 
Thanks,
Zach


I think the proper question is 'How well will a 4.0 head work on a 232?'.  Probably not well enough for the amount of work you will do.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote billd Quote  Post ReplyReply Direct Link To This Post Posted: May/22/2009 at 8:17am
That's what I was thinking and couldn't come up with the words.
Well said, Peter.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 1968AMC770Wagon Quote  Post ReplyReply Direct Link To This Post Posted: May/26/2009 at 8:58am
Thanks for all the help. I had computer issues so I couldn't get on.  I decided against the 4.0 head.  As you guys have said, way too much work for the little gain i would get. 



Zach
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Post Options Post Options   Thanks (0) Thanks(0)   Quote nosigma Quote  Post ReplyReply Direct Link To This Post Posted: May/27/2009 at 8:27pm
I hate to get you all spun up on this again but I think you would see a rather large increase in HP if put the 4.0 head on the 232 block.  If you look at the flow bench results (see sticky at the top of this page) the 4.0 head flows at least 25% better on the intake andd exhuast side stock.  If you do a mild clean up of the bowls and throats you will get about 30% more flow. 
 
The increase in flow is fairly proportional with HP.  The head you have is an open chamber head with a lousy flame spread, no quench and no swirl.  The 4.0 HO has quench, swirl and a better flame pattern.   This will only add to the hp increase.
 
If you go to the 4.0 HO head just make sure you get pushrods that oil through the center and lifters to match.
 
John
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