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Unread 12-18-2007, 04:37 PM   #121
aje3721
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258 with an option for a 304

This may be off topic but forgive me as I am new here. I recently picked up an 84 CJ-7 with the 258 and have a buddy that has a 304 for the asking with all the brackets etc. from a CJ. I am pleased with the 258 and had planned on the necessary upgrades such as a Weber and HEI but the old motor head in me is thinking about the 304. My question is this: would I really benefit from the 304 if I simply want a reliable toy for the woods and nice days given the effort to replace an otherwise sound 258? Is the mileage going to go down the tubes with the 304 compared to the 258 if I drive it like an old lady? These answers should get me started! Thanks in advance!

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Unread 12-26-2007, 11:41 PM   #122
jonazbell
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amc 360 flywheel.

is there any special considerations when installing the flywheel. for example the correct position of the flywheel. i understand that the flywheels are balanced to a specific motor.
Quote:
Originally Posted by BLS33
People ask about swapping AMC V8's into their CJ's all the time, so hopefully we can use this thread to answer all the questions you may have. You can use this thread to ask more detailed questions about specific problems


MOUNTS
-Passenger side frame mount needs to be replaced with one from a CJ that had the 304 (commonly found on ebay)
-Both side block brackets need to be replaced by ones meant for a CJ with the 304 (again check out ebay)
-Any local parts store will carry neoprene mounts you may need.
Thanks fuzz401 for the pics!
Frame mount AMC I-6 to V-8
I-6 3 slots / V-8 2 slots





CJ - V-8 block mount (bracket)

OR
M.O.R.E. Makes a set of bombproof mounts which eliminates the need for any other frame mount, neoprene mount, or block bracket
because its all built in they can be found here: http://www.4wheelerssupply.com/catal...oducts_id/1781

Flexplate/Flywheel
AMC V8s are externally balanced, so use matching components for vibration dampers, flywheels, and flex plates. If your having trouble finding a 360 flywheel, a 258 flywheel can be rebalanced and used. You also need to keep in mind the correlation between the tranny the engine used to be bolted up to and the one in your CJ. For example if the engine was bolted up to a th400 but your Jeep has a tf999 you will need the proper flexplate (balanced to whichever engine you are using) to bolt up the the tf999's torque converter.

Cooling
The only engine I'm 100% sure has a matching radiator outlet to AMC V8's is the 258. You can reuse the 258's radiator but
if you want to upgrade you can use a radiator meant for a CJ with the 304, if you are swapping out an I4 or 232 you should
go ahead and upgrade.

Wiring
(this information is based on swapping out a 258, someone else can go deeper into the wiring of this and other engines)
Engines older then 1978 have the prestolite ignition system, while 78 and newer will have the duraspark system. The 2 arent
compatible with eachother, a way to solve this is go HEI. Other than that you may need to lengthen the coolant temp sensor
wire.

Use the wiring diagram for a 1980 CJ with a 304 V8, it will be correct for AMC V8 swaps.

Exhaust
I would just go custom on the exhaust. Hedman as well as some other companies (check http://summitracing.com/) make headers for this swap, otherwise you can just use the stock manifolds and custom exhaust from there. If the engine you are using is really old (66-69) you should make sure to get the stock manifolds because of the rectangular port heads.


This is probably the easiest of the V8 swaps, and with the help of JF anyone can do it!


(If anyone sees any mistake let me know, also add anything you feel is needed)
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Unread 12-27-2007, 06:34 AM   #123
jp360cj
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you are correct that the flywheel is balanced for the motor. You'll notice that when you try to install the flywheel that the bolt holes only line up one way because they aren't evenly spaced. this ensures that the flywheel will be bolted on correctly to balance the motor.
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Unread 12-27-2007, 09:03 PM   #124
jonazbell
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i am installing an amc 360 in a 79 cj5. manual brakes and manual tranny. what vaccum lines needs to be run for this setup. holey carb and edelbrock intake. i know the pcv to carb, the crank case, and the distributer. is there any other line or special arrangement that you can think of that would be needed for this application. non egr motor

Last edited by jonazbell; 12-29-2007 at 09:58 AM..
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Unread 01-02-2008, 12:03 PM   #125
speeddemon651
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Offical Header Question

I have a Offical Header Fitment question !
I've got a 83 CJ7 was a 6 and just finished bolting in the AMC 360. I'm running the 176 trans / dana 300 with midified drive shafts to the correct length. I'm using the M.O.R.E. bomb proof engine mounts. With that said, I just bought a awesome pair of stearling coated Headman long tube Headers(part #99208 I believe) , When I first mocked them up they looked fine , but now I can see with them firmly bolted down, Its a total no go. They rest on the rear leaf spring mount on the passanger side and on the driver side I'm hitting my slave cylinder and will not come anywhere near bolting up. I called M.O.R.E and asked what headers they would go with and they said "not sure, and to try the forums". So guys I've heard hooker, Dynomax, and certain Headman headers will work. Does anyone know exactly what headers ill fit my application ? I really don't want to run Fender Well Headers. My plan was to keep the exhaust nice and tight inside the Fame rail's with small mufflers and turn-downs before the rear Diff. I'm also looking for the most performance I could get out of these headers. My 360 has a mild cam, nice intake and 4barrel. Thanks for your time

Last edited by speeddemon651; 01-02-2008 at 01:02 PM..
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Unread 01-02-2008, 08:44 PM   #126
fuzz401
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Quote:
i am installing an amc 360 in a 79 cj5. manual brakes and manual tranny. what vaccum lines needs to be run for this setup. holey carb and edelbrock intake. i know the pcv to carb, the crank case, and the distributer. is there any other line or special arrangement that you can think of that would be needed for this application. non egr motor
PVC to carb
oil cap to air cleaner
ported to dizzy
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1978 cj-7 had since 1979
401 .030 over- full floating flat top pistons
crower solid cam 292 dur .500/.510 lift
turbo 400 tranny 2500 stall
model 20 transfer case
aj delux glass body
4" lift
dana 30 frount
dana 44 rear
4.56 gears
http://img2.photobucket.com/albums/v...slideshow=true
http://photobucket.com/albums/v31/fu...slideshow=true
13.461 @ 92.45 mph on 37" super swampers on 1/4 mile
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Unread 01-03-2008, 05:18 PM   #127
JRichards
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151 to 360

Great thread but I need some additional help. I pulled a 4 cylinder from my '81CJ5 and have been building a AMC 360. I have the SR 4 transmission and Dana 300 xfer case. I need help with the following:

1) will stock 304 CJ5 frame mounts work and will they bolt up where the 4 cylinder frame mounts came off?

2) will any bell housing from a 304 work with my transmission?

3) will I need to move the transmission mount on the skidplate? (Please don't tell me that my drivelines won't work!)

4) is the SR4 (which appears not too popular) more of a light duty trans and should I replace it with something else, if so what? The purpose of the Jeep will be primarily for road use and a little off road.

Thanks in advance for the information.
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Unread 01-03-2008, 06:48 PM   #128
Rollbar
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?
Does the 360 conversion need a return line? I'm going to run a Holley 650 double pumper. I don't see where it would but I just need confirmation. I ordered the (fuel/brake set up w/out the return) SS lines from inlinetube.com. Everything was trashed.
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Unread 01-03-2008, 08:16 PM   #129
fuzz401
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650 Dp is going to put a lot of juice in there for off road use
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1978 cj-7 had since 1979
401 .030 over- full floating flat top pistons
crower solid cam 292 dur .500/.510 lift
turbo 400 tranny 2500 stall
model 20 transfer case
aj delux glass body
4" lift
dana 30 frount
dana 44 rear
4.56 gears
http://img2.photobucket.com/albums/v...slideshow=true
http://photobucket.com/albums/v31/fu...slideshow=true
13.461 @ 92.45 mph on 37" super swampers on 1/4 mile
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Unread 01-03-2008, 08:26 PM   #130
Rollbar
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I know Fuzz, I just want to be like U cause U R the MANNNNNNNNNNNNNnnnnnnnnnnnnnnnnn!

P.S. So I don't need the return line? I don't think so cause I didn't have one on my 304, just need a confirmation.
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Unread 01-04-2008, 07:37 AM   #131
speeddemon651
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Headers ?

Looking for headers that will not hit my steering shaft , slave cylinder, or leaf spring mounts, for a AMC 360 in a 83 CJ7, and don't want fenderwell headers. Any ideas ?
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Unread 01-04-2008, 07:58 AM   #132
jp360cj
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If it's all stock, any 304 header for a CJ7 should work. If not, a set of shorties almost always works
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Unread 01-06-2008, 06:24 PM   #133
Bahama Blue
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I have done the 360 swap in my 83 CJ7 and I think the mentioned issues here covered everything I encountered.

I do have a question though. I just had the tranny out (T5) to replace the pilot bushing. I purchased the one for a T5 and was told that they are all the same for the engine (258,304,360 etc).

It fit the shaft on the tranny fine but it was really tight getting it into the motor. I must have distorted it a little when I installed it because when I made attempts to reinstall the tranny it now wouldn't fit.
I took my rotary tool with a diamond bit and shaved a little off to make it work.

Are these bushings supposed to be this tight to install?? Like I say, this was the only bushing it called for with this application.

Anyone else encountered this??
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Unread 01-06-2008, 06:35 PM   #134
BLS33
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Quote:
Originally Posted by speeddemon651
Looking for headers that will not hit my steering shaft , slave cylinder, or leaf spring mounts, for a AMC 360 in a 83 CJ7, and don't want fenderwell headers. Any ideas ?

I'm guessing they are full length headers right? Youshould be able to run in frame because you have a manual tranny, but you may want to try a set of shorties. Do you have any pics of the full length ones installed?
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Unread 01-06-2008, 06:37 PM   #135
Bahama Blue
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Oh one thing I wanted to mention in relation to the 360 swap. If you are running new fuel lines, you may want to consider fastening them to the outter side of the frame.
I did a frame off resto and ran them inside because it looks neater. I guess I wasn't thinking far enough in advance because I later had a custom duel exhaust installed which was obviously inside the frame.
The jeep would run fine for about 20 min and then begin spitting and running terrible. The exhaust was just too hot and it caused the fuel to percolate.

This caused a fair bit of work to rerun all the fuel lines but it completely solved the problem.

Keep the lines away from heat sources...especially headers and exhaust..

This wasn't an issue when I was running a single exhaust with the 6cyl because the exhaust was on the opposite side of the fuel lines..

Sounds stupid but it happened to me. I don't want you to go through it..
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