Engine cant get a 304 so how about a 360

[Markcj79]

So apparently AMC 304 's are hard to come by and my block is trashed so no rebuild there. Can I drop an amc 360 in and bolt it directly to the T-18 tranny I have or do I need an adapter. Do all the externals i.e. timing chain cover, bell housing, intake etc from my old 304 bolt on to the 360? I really don't want to spend the money for a LS swap.

 

[Patrick]

If you are in the deciding stage, look at a GM v6. The newer the better, just as powerful as a classic v8 in a lightweight package and shorter block, and significantly more fuel efficient. Expensive to adapt, but will pay back in economy and overall satisfaction.

 

[Patrick]

I can’t answe your question directly, I am sure others can.

 

[CJ]

So apparently 304's are hard to come by and my block is trashed so no rebuild there. Can I drop an amc 360 in and bolt it directly to the T18 tranny I have or do I need an adapter. Do all the externals i.e. timing chain cover, bell housing, intake etc from my old 304 bolt on to the 360? I really don't want to spend the money for a LS swap.

Putting in a 360 is almost a direct swap.

Almost everything from the AMC 304 will work on the 360. It will use the same motor mounts and bolt right up to the Transmission . You will need the correct flywheel though as well as pressure plate and disc (10.5" vs 11"). You can use a 304 flywheel on a 360 but it requires machine work and balancing.
Also some accessory mounts may need some work which attach to the heads.
It's an easy swap.
What year 360?

Download our Master Parts Catalog and you can compare whats needed. -->> https://jeep-cj.com/community/downloads/1974-1980-jeep-dealer-master-parts-catalog-f-74080.96/

Example:

 

[gert]

Pretty close to direct swap, i love mine

Best swap candidate would be an FSJ 360 built after 1971 that way all your accessories are the same

The only thing you need to change is the flywheel as the AMC 304 and 360 are balanced differently

JEGS 601450: Flywheel for 1972-1991 AMC/Jeep 360 V8, 164-Tooth [Externally Balanced] - JEGS

1972-1991 360 in. V8 AMC/Jeep Manual Flywheel

www.jegs.com

So $120 plus whatever the motor costs


Sent from my iPhone using Tapatalk

 

[Project86]

Just think, LS parts are everywhere and you'd be on the road. Finding parts for AMC stuff is getting tougher. I remember you starting a thread about this very thing.

 

[Markcj79]

So i have the new flywheel for my new 360 ordered. What about the front dampener? Will the old one off my AMC 304 work or do I need a new one of those also?

 

[Markcj79]

Sorry i meant harmonic balancer

 

[gert]

According to oriellys no you do not need a new balancer, they list same part number for AMC 304 and 360

Dorman OE Solutions Harmonic Balancer 594-135 | O'Reilly Auto Parts

Find the right Dorman OE Solutions Harmonic Balancer for your 1980 Jeep Cherokee at O'Reilly Auto Parts. Place your order online and pick it up at your local st

www.oreillyauto.com

Sent from my iPhone using Tapatalk

 

[Markcj79]

Thanks, hopefully now I have all the bits n pieces ready for my motor when it comes in. I'll let yall know how it goes.

 

[254Tripl3]

Mark, not sure where you are located but I asked my machine shop and he has 3 - AMC 304 blocks sitting on the back shelf. When I had my 304 rebuilt, I wish I would have thought a bunch more about it as I could have put a 360 in it for about another $600 for block/heads, as I spent on the 304 rebuild and would have had much better heads on the 360 vs 304

 

[Markcj79]

According to oriellys no you do not need a new balancer, they list same part number for 304 and 360

Dorman OE Solutions Harmonic Balancer 594-135 | O'Reilly Auto Parts

Find the right Dorman OE Solutions Harmonic Balancer for your 1980 Jeep Cherokee at O'Reilly Auto Parts. Place your order online and pick it up at your local st

www.oreillyauto.com

Sent from my iPhone using Tapatalk

So I got the new 360 installed runs great. Only issue I’m having is after driving for awhile and warms up it doesnt want to shift into 1st or reverse. Shifts fine when I first start driving. Anybody ever had this issue.

 

[Markcj79]

So I got the new 360 installed runs great. Only issue I’m having is after driving for awhile and warms up it doesnt want to shift into 1st or reverse. Shifts fine when I first start driving. Anybody ever had this issue.

I also used the same clutch that was on my old AMC 304 .

 

[NotTJ]

Putting in a 360 is almost a direct swap.

Almost everything from the 304 will work on the 360. It will use the same motor mounts and bolt right up to the trans. You will need the correct flywheel though as well as pressure plate and disc (10.5" vs 11"). You can use a 304 flywheel on a 360 but it requires machine work and balancing.
Also some accessory mounts may need some work which attach to the heads.
It's an easy swap.
What year 360?

Download our Master Parts Catalog and you can compare whats needed. -->> (Link)-> 1974 - 1980 Jeep Dealer Master Parts Catalog F-74080 -<

Example:
View attachment 78317

I am going AMC 258 i6 / 4.2l to 360. I have a stock 258 LUK clutch. My understanding is that the clutch I have should work with a 360 flywheel? Are you saying the flywheel for the 360 only takes an 11" clutch?

 

[CJ]

Stock clutch for a '78 360 is 11" / 1.125" (1 1/8") dia input shaft and '78 AMC 258 i6 / 4.2l stock clutch (most common) is either 10.5" / 1.0625" (1 1/16") dia input shaft or 11" / 1.125" (1 1/8") dia input shaft depending on if it's heavy duty.

 

[NotTJ]

Stock clutch for a '78 360 is 11" / 1.125" (1 1/8") dia input shaft and '78 258 stock clutch (most common) is either 10.5" / 1.0625" (1 1/16") dia input shaft or 11" / 1.125" (1 1/8") dia input shaft depending on if it's heavy duty.

I need to check what my NP435 input is beforehand. Once the 360 is ready to swap in I would rather put a new clutch on it on the ground than find out under there that its the wrong one lol.

 

[CJ]

I need to check what my NP435 input is beforehand. Once the 360 is ready to swap in I would rather put a new clutch on it on the ground than find out under there that its the wrong one lol.

Don't forget to check the input shaft spline count also. Be sure and get a throw out bearing as well as a pilot bushing. Check the fit of the id of the bushing to the od of the small stepped down part of the input shaft.

 

[NotTJ]

Don't forget to check the input shaft spline count also. Be sure and get a throw out bearing as well as a pilot bushing. Check the fit of the id of the bushing to the od of the small stepped down part of the input shaft.

Bummer because I just did all that a few months ago THEN decided I wanted a 360. So theres all brand new parts under there and they may not be simpatico with the 360. The pilot will be a Novak part, the throw out should be the same nothing changing there, mainly just the diameter of the pressure plate and disc fitting the 360 flywheel (remember the Transmission is staying NP435). In such a light vehicle I would definitely run the 10.5 clutch if it fits the 360 flywheel but that is to be determined! I have seen some flywheels drilled for 2 pressure plates but no idea if the new reproduction 360 flywheels have any of that.

 

[CJ]

If your fly wheel is not dual drilled any machine shop can put in some new dowls and bolt holes as needed for a 10.5" dia. for just a few bucks. Should take less than an hour labor.

 

[CJ]

If you lived closer I'd do it for ya...

Xlo602

• CJ
• Feb 22, 2009