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  #1  
Old 11-08-2020, 07:08 PM
84G-Wag 84G-Wag is offline
230 Tornado
 
Join Date: Oct 04, 2020
Location: NV
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4.0,304, 350 Swap ideas/ Brainstorm

What do you guys think about the idea of a stroker 4.0 and a 4l60e. WOuld building a stroker be worth the money of having to spend on the adapter for a 4l60 ? I have a 258 in it so I can salvage the crank and some costs there. Theres also a 304 for sale for 200 bucks complete and running , and a 350/4l60e out of a suburban for 1500. You guys are the experts, Im still learning how these Waggys operate. I love the 258 for wheeling but a 30 mile haul to work on the highway isnt doing me too good.
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Old 11-08-2020, 07:55 PM
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Cliff Cliff is offline
350 Buick
 
Join Date: Mar 30, 2002
Location: Upper East Tennessee
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Since you already have a 258 I would go with the 4.0 head, plus you could do some other cool mods. Lots of goodies for the sixes. My son is building a 258/4.0 for his AMC Spirit - raising the CR, Clifford manifold, Holley 390, split headers, Lunati RV cam. He's using a 5-speed so I don't have much to contribute regarding the tranny, but the 200 and 700 GM 4-speed auto tranny's are possible too.
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Old 11-09-2020, 04:27 AM
wiley-moeracing wiley-moeracing is offline
350 Buick
 
Join Date: Feb 15, 2010
Location: arizona
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Doing a 4.0 stroker is not cheap, just did one for a customer and he had $6,000 in it and still needs more computer work to make it run right. For costs and ease put a amc 360 in. for the trans side instead of running the chevy trans you can run the aw4.
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Old 11-09-2020, 05:20 AM
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tgreese tgreese is offline
 
Join Date: May 29, 2003
Location: Medford MA USA
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As an intermediate step, you could put the 4.0L HO in and get it running. Excellent Mopar/Bosch MPI. Supposedly the AW4 that typically came with the 4.0L HO is an excellent transmission.

If I really wanted the GM transmission, I would think the complete engine/trans/tc from a late model Chevy truck would make more sense. Another package with excellent MPI. Many have done the Vortec swap - you'd get lots of help.
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Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination ATs, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
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Old 11-09-2020, 06:18 AM
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SC/397 SC/397 is offline
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The running 304 you found would be the cheapest way out.
I have a pile of rebuildable 360's that you could have for $250.00 each.
I have a couple of 401's that I would consider selling but at the going rate..
If you have to rebuild one, rebuilding a 360 would probably be the most inexpensive way but building a 383 stroker out of a 360 would be more fun.
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Old 11-09-2020, 02:00 PM
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J20 project J20 project is offline
304 AMC
 
Join Date: Dec 27, 2000
Location: Nevada
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swap

I once coached a mechanical engineer through his 258 to 360 swap....He listened for a while and then got smarter than me.

He put a camshaft into his 360 which would have been compatible with drag racing.....and seemed to hate me over it....f/ing people don't listen. I suggested he put a Melling Mt1A cam in which makes power/torque much lower but hey....whateve.


J20
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Old 11-09-2020, 04:36 PM
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Cliff Cliff is offline
350 Buick
 
Join Date: Mar 30, 2002
Location: Upper East Tennessee
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You're right Bud - the 4.0 deal my son is working on isn't cheap. But so far it isn't much more that what he would spend on a V-8 and it will be unique. His big money went into the 5-speed, replacing the original 904.

I prefer the V-8 myself, and would have no problem with even a 304 in an FSJ.
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Old 11-09-2020, 06:50 PM
84G-Wag 84G-Wag is offline
230 Tornado
 
Join Date: Oct 04, 2020
Location: NV
Posts: 5
Quote:
Originally Posted by SC/397
The running 304 you found would be the cheapest way out.
I have a pile of rebuildable 360's that you could have for $250.00 each.
I have a couple of 401's that I would consider selling but at the going rate..
If you have to rebuild one, rebuilding a 360 would probably be the most inexpensive way but building a 383 stroker out of a 360 would be more fun.
What state are you located in, also guys any tips on the 304 ? Like i said im a chevy guy
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  #9  
Old 11-10-2020, 09:05 AM
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J20 project J20 project is offline
304 AMC
 
Join Date: Dec 27, 2000
Location: Nevada
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FWIW, I had a 304 in 73 J3000 w/ auto. 33 in tires 3:73 gears. It was adequate but just barely in my opinion. A 304 is a great engine for something smaller but not for a truck which none of us leave alone...I have found that the 360,401, and 350 chev engines all worked a lot better. I actually think I would have preferred a 258 as long as it was against a decent 1st gear manual trans like the T18. My cousin had one and it worked well.

J20
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775-537-7918

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  #10  
Old 11-12-2020, 11:43 PM
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spduffee spduffee is offline
232 I6
 
Join Date: Jul 20, 2017
Location: Washington (WA)
Posts: 64
I just finished swapping a 304 for my 360. The idea is to rebuild the 360 and put it back...maybe. I paid $500 for the 304 and gambled on its true condition (it came from a storage-wars type thing). It all looked newly rebuilt, smelled like it too and sure enough it was ok. I am happy with the 304...
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  #11  
Old 11-13-2020, 09:31 AM
SJTD SJTD is offline
304 AMC
 
Join Date: Apr 26, 2012
Location: Lompoc and Sunland, CA
Posts: 1,650
I put a 4.0 head on my CJ. I am disappointed with it. Maybe it's the stock exhaust system?
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