Keep the six cylinder with carburetor but covert it to propane. Then you can run it at just about any angle you want. Proper axle gearing is probably more important than the power plant. I’m still running the 2.5 with stock 4.10 gears and 35s. Soon I’ll be regearing to 4.56. (Dana 44 front and Ford 8.8 rear)

I love Jeep YJ's. Mine is nearly finished... (finally) 1991 YJ 4.0L AX15. It had the high pinion Dana-30 in the front, but I swapped in a Dana-30 without the CAD from a '98 XJ. I also swapped an XJ Dana-44 in the rear. In the past I had considered swapping in the crappy 305 (w/Quadrajet carb) from my crappier '87 Camaro, then changed my mind and planned to swap the 3.9L 4BD1T diesel from my old Isuzu NPR. Even considered swapping in the little 1.9L ALH diesel I have sitting in the shed. But I just like the 4.0L too much so it is staying.

318/360 magnum they are like 300 bucks now, basically indestructible

@Welcometofacsistube

6 жыл бұрын

tom busby damn rights

@ramairgto72

6 жыл бұрын

I had the 360 in my 1998 ZJ (lx) , they eat water pumps for some reason. In any case, they are cheap because aftermarket parts and cost are much higher vs any 305 or LS swap.

@cbrr7615

5 жыл бұрын

We have a shop here in Michigan at does work on all Jeeps well as straight from the factory floor 318 conversions on the 2019 Jeep's that are quite a site to behold. They also do plenty of R&D work directly with FCA's Jeep engineers and had a "pilot" Jeep in their shop about a year back doing their 1st 318 conversion not only for future product, but also for one of the Jeep execs. Wasn't a fan of the new Jeep until one of their techs spent an hour of his free time going through the whole thing with me. After that have to confess that it's quite nicely engineered and set up quite nicely to support all the aftermarket sellers.

@jimholmes2555

4 жыл бұрын

An inline straight engine will out live a V type engine 6 to 1.

i really liked this Q&A i would love to see more in the future

If you CAN keep the 4.2 ( I assume you're swapping out a motor with a working bottom end and doenst have a hole in the block), and want a little more power. You can keep it simple with taking your head to a machine shop and getting a good 5 angle valve job, new springs, a new cam, and a well sorted exhaust, should liven the 4.2 up pretty nicely. If you splurge a little and get a trick EFI system you can run different tunes to liven it up pretty nicely over the stock Carb as well..... A V8 swap though cool is alotta headache and in my own opinion is more for show than actual work. Plus you aren't gonna have to hassle with getting a bellhousing adapter and cutting up your front suspension...... and with the money you can save over doing a motor swap you can reinvest that into your suspension (stronger axles, 44's front and rear, lockers, even bigger tires if you need them)..... Just my two sense from a guy who likes motors on KZread

I did the v8 swap, a 70s Sbc block with vortec heads and msd fuel injection.th400 np203/205 with Chevy 6 bolt axles. It works great.

@ramairgto72

6 жыл бұрын

I have a decision to make about my M-715 project, has the idea of using the military AMG 242 Transfer case. Not building a rock crawler, tho I think that case would take it.

A 304, 360, 401 will bolt directly to the ax15, you just need the correct pilot bushing, motor mounts and radiator big enough to cool it.

this is so obscure. It's fascinating and hilarious all at once.

I installed a 305 out of a 77 Nova in my 89 YJ over 20 years ago and it's been a daily driver ever since. I had the first the advanced adapters kit in the torque flight 999. However, the crank twisted the center out of the flywheel one day so I installed a turbo 350 trans. Other than the fuel economy everything's been fine.

I had a buddy with a yj shoved a 5.9 magnum with a ax15 and a Ford 8.8 in the rear and it works great

I had the a 87 Yj and loved the 4.2L just my .02c

ADVANCED ADAPTER HAS BEEN AROUND SINCE THE 80S!!!!

Watch the engine masters for the 305 they did. Actually made great power and was torquey af. Exactly what you'd want in an off road rig

@phantomwalker8251

6 жыл бұрын

no no no,you need low down torque,ie,6 cyl,go see a mechanic with brains,not speed,up his nose.ever heard of unimog,

@fataxe1

6 жыл бұрын

harry walker an all stroke and no bore motor makes low down torque. And a similar displacement v8 compared to a v6 will make more torque and power every day.

Did a 302 and a T18 into my cousin's for him. Just took a motor mount kit welded in, and a t18 adapted to his 231 via a Novak kit and replacement output shaft. Custom driveshafts from a little shop. Worst part was getting a hydraulic slave cylinder setup. Basically chopped the factory master cylinder out and put in a Ford one on the firewall. Weird P/N for the bellhousing we had (which came off a 78 F250 camper special with a manual clutch) to make it work but it's fine now. Still has the 35/30 combo open/open waiting to grenade, but he doesn't offroad, it's just an around-town ride for him. Bottom line, if you're at all mechanically competent, figure out what you have first and then what you need to do to adapt it. We had the T18 first, and then pieced together three junkyard 302s. Has the heads, intake, and exhaust from a mustang, the block and rotating assembly from a crown vic (reringed, all new bearings, dingleball honed), and the accessories from an f150. Basically grabbed three motors on the cheap from my buddies at the local junkyard, and picked what was best out of all of them to make one.

A Chrysler 8.25 would work good and if you pull the right one you can stay 5 lug and rear disks

I love these guys

Seriously. I'm a chevy guy, but if the 4.2 runs good. Just keep it add FI and wheel.

@tyler-yz5cv

4 жыл бұрын

My 4.2 runs great but the bloody highway speeds are painful. However, if its healthy its still fun

@tyler-yz5cv

3 жыл бұрын

@Jbog07 Could be, i mean i do 70 fine. Besides, on that little death box i don't want to go any faster lol.

I have a YJ 4.2 with a header with Howell EFI runs pretty good

AX15 would be okay, none of the other YJ transmissions would be remotely strong enough. For the price of the adapter to run the AX15 though, he could get a T18 or SM465 and have a much beefier transmission at the cost of losing overdrive. Once you've got big tires though, 4th gear starts to feel a lot like 5th does stock, and with the granny gear you could avoid regearing. That's my plan with my V8 swap, already have my drivetrain. I do have to wonder what the point of swapping in a 305 is, given it makes about the same power as a 4.2. I think it'd be a waste unless you just wanted the V8 sound. You guys touched on that too though. Of course I can't say too much, I plan on swapping an AMC 360 into mine. Additionally, as far as axles, he has a high pinion D30 and a D35. They didn't use a low pinion in a YJ. He can do the Ford 8.8, it's literally almost bolt in, and keep the HP D30 and he'll be good for 35s and potentially 37s. The 8.8 can even usually be found in matching ratio and with a limited slip. The 8.8 is far and away the best swap into anything 5 lug and small truck width, and can easily handle the power of a 305 and more.

I'd do whatever Dave says. His Ultimate Adventure rig was sick and he knows his stuff

THANK YOU SO MUCH.

I LOVE THE JEEP YJ!!!!

You said that he would need to cut out all of the factory mounts to make it leaf spring. All YJ wranglers were leaf spring front and rear. Wranglers didn't get coil spring suspension until the TJ came out. To all of the people that are complaining about him wanting to use a 305, there is nothing wrong with them. There is a good reason that GM kept producing the 305 instead of the 327, 307, and so on. 350s are no real power houses until you dump alot of money into them.

@AgamemnonTWC

6 жыл бұрын

Scott Garboden They were talking about swapping in an XJ front end, which is coil sprung. They were wrong to begin with though, as the YJ should have a high pinion axle like the XJ.

Dropping in a 350, nv4500, full Chevy harness... other issues I may tun into?

Jeep YJs all had high pinion Dana 30's from the start. A one piece axle shaft from a high pinion XJ will get you rolling.

Why not swap in a 4.0 HO from a 91+ XJ? Bolts right up, motor mounts fit, everything fits (even the exhaust!) and you get 197 HP. Of course you'll have a lot of wiring harness work instead though, but most of it should be transferable from the XJ.

Dave was also talking about going to a carb or aftermarket FI, the 90 YJ was still carb from the factory so what's the difference. 91 was 1st year for FI on the 4.2.

Hello from birmingham!! Y'all by sloss furnace tracks?

Agree keep the 4.2

I have a 305 as well but a 2001 jeep wrangler tj. With a 2.5 liter with a 5 speed manual. Would i use the same thing as Brian Wing

We need more yotas build!!!!!!! Amen

Fred, do you know anyone making the ford 4.0 to 700r4 adapter kit?

Awesome

You guys should build that 4 cyl you have at home with an sbc 350, and make an episode of it

SUGGESTION: MORE JEEP YJ IN SOCIAL MEDIA!!!!

what about using a chevy 3/4 44 front and corporate rear? And would like to go 327 and th350 with 205 transfer case

A well build 305 can be a GREAT option but the internet experts will never accept it, I just build one on my 81 c10, 15 mpg, makes great burnouts and I already have smoked a couple of 350 c10s

It's all in the gearing lol

I miss you guys

Damn Dave Chappelle looks different now.

@josephhill702

6 жыл бұрын

He got one of those sammy sosa treatments...

Nice

i basically want to build tube sock but with a 4.8 v8 or 5.3 chevy v8 same axels liftish maybe better trans and transfer case

@imnottellingyoumynamedude

6 жыл бұрын

Leadfoot2112 but the 2.8 Cummins is so cool

Hey FRED! Get a supercharger and put it on a wrangler TJ with the 4.0 i6. Get it dyno'd and film it... and stuff!

Build a green Tacoma!

Dave, you're the unsung hero of dirt everyday. But you're awkward. Awkward, awkward, awkward. You know your shit and you're awesome. Fred, appreciate Dave.

So I've been wanting to put the Mopar fuel injection on my CJ8! WHERE CAN I FIND THAT KIT?? seems like it vanished off the Aftermarket or something! PLEASE let me know! Thanks!

YJ Dana 30s are high-pinion. Really surprised these guys didn't know that.

I am building a 86 Chevy 3/4 ton and I was wondering will a rebuilt 350 have enough power to do every day hauling or be able to do truck pulls?

@connerbutler1077

6 жыл бұрын

dude2001steve 454 swap...

@dude2001steve

6 жыл бұрын

But I also would like to pass the gas station to

@ramairgto72

6 жыл бұрын

Steve, you can run the 350, but would look for an LS engine over the Gen II SBC. If you just plan to tow, I would find a Cummins 4BT or 6BT. Even a Detroit Diesel 6.2 or 6.5, they are stupid cheap. The 454 is a bad idea.

@jaygraham4095

6 жыл бұрын

The old school 350 can make decent power. But the diesel swap would be best for towing and truck pulls. 454 terrible idea. Newer LS is better than a big block.

@dude2001steve

6 жыл бұрын

Jay Graham I would like to keep the 350 plus I would be plowing my yard with it and what towing I would do with it wouldn't be long distances

What's the point in putting a 305? Might as well just out a 350

Make sure it is an AX15. That should be a BA10 with the 4.2 engine

@ericbuist8218

6 жыл бұрын

4.2L got the AX-15 mid-'89 if I remember correctly.

yjs have high pinion and reverse cut gears

My 305 makes 325hp but it is bored .30 over so take it as that is

Plenty of 360 and LS with ax15's living behind them

My yj has a high pinion with center axle disconnect. I thought they all were the same on the yj.

@zanestidham5766

2 жыл бұрын

All yjs and renix xjs had disconnect high pinion dana 30s

Why get only marginally better power out of the 305? Just bore out and stroke the 4.2 liter inline 6. Great torque, stock, no carb, and much more power

They trolled this guy so hard😂😂😂

Hey can someone tell me pleas what diffs do the 1986 thru 1996 2.4 Nissan hardbody have and the 1986 thru 1996 v6 hardbody have ???pleas

@djknauss1

6 жыл бұрын

i traded my 94 hardbody for a jeep. i still see it driving around town on occasion. also, i hope santa is real and comes tonight

I'll add to the group... why the hell would you go with a 305?

H.O. Ford 5.0 paired to a borg Warner t18 4 speed out of a 81 f150 in my YJ. Leaps and bounds better than the 2.5 in reliability and performance.

I thought dave chappelle was black? 🤷‍♂️🤔😂

@beardeddefguy

6 жыл бұрын

Chase Ventrillaquist Reynolds no, he's a black supremacist.

@herrick75

6 жыл бұрын

Chase Ventrillaquist Reynolds he is?

4BT all the way, I regret not doing it sooner.

@rediron44

3 жыл бұрын

Too heavy. Get the one thats in Tube Sock

So swamped a 88 Cherokees engine into my 92 yj and now can’t get it to start I used all the yj parts onto the Cherokees engine except for the flywheel witch I left from the Cherokee any thoughts on what’s going on with that?

@rhull3939

4 жыл бұрын

Probably the canuter valve.

Did he ask what motor to buy? Did he say he was buying a motor? So what dose buy this motor it's better have to do with it? You want the motor, you buy it.

ALL YJS HAVE A HP DANA 30 with cad in the FRONT, NO YJS HAVE A LOW PINION 30.

@waterloo123100

6 жыл бұрын

Gealii No they don't.

@Gealii

6 жыл бұрын

the only change made to the yj dana 30 was the larger ujoints towards the end of the yjs run. All yjs have high pinions with CADs from factory

@waterloo123100

6 жыл бұрын

Gealii I read that wrong lol thought you said they have low pinion. Oops

@rc3140

6 жыл бұрын

Gealii no you are WRONG!!!!

@Gealii

6 жыл бұрын

prove me wrong then

6.0 ls and a 4l80e with an adapter plate for the transfer case

@ramairgto72

6 жыл бұрын

Agreed. Even a 4.8 would be better. He could PAC spring it, put a China turbo on it.

305? Why waste the money?

@Terruhcutta

6 жыл бұрын

Harry Balzack if he already has it, it would be cheaper than an LS for sure. If he has a donor vehicle it could be even cheaper. But a 350 is so much better

@herrick75

6 жыл бұрын

Harry Balzack when you have money to waste who cares?

@herrick75

6 жыл бұрын

Harry Balzack mmmmmm

@herrick75

6 жыл бұрын

Harry Balzack Harry ballsack

4.2 can pump out way more torque

What if they made the video and the guy who did the question doesn’t even see it

A 305, in modern times, would never be worth it. Hell, 305's sucked back in the day. I can't believe anyone even remembers those damned things, let alone would want to put one in a YJ as an expensive and time-consuming project.

305 Chevy swap is about the best. Even though the 4.0 has the same horsepower and way lighter. A 4bt Cummins is super heavy and maybe 360s are common where you are but not where I am. There is a SBC swap for literally everything. And 305 won’t tear the jeep apart due to their awful frames

Idk I hate people who say first

@elilivezey7884

6 жыл бұрын

Let the hate flow through you

@poopyhead8358

6 жыл бұрын

Eli Livezey um what

Fyi every yj from 87-95 had a high pinion front Dana 30 with the “cad” these axles are tough watch my videos for proof

Drop a 4.0 HO head and EFI on the 4.2. That thing will smoke a 305 with less work.

@rediron44

3 жыл бұрын

Absolutely. The 305s are not a engine I would swap into anything

Dude get a 360 and be done with it. Or a Cummins 4bt

@drakedavis6634

3 жыл бұрын

Do you know how heavy a 4bt is? A 305 won’t tear it apart. And there is a Chevy sbc for literally everything. And 305 is one of the most common engines.

Is Dave's nickname Dirtbag Dave or is that only in my head?

@HarrySituations

6 жыл бұрын

Its Dirthead Dave

نبي كابرس90 وكابريس2008

You dont have christmas in your country ??????

No YJ had an LP30...

I'd love to hang out the next time y'all are in Birmingham. Shoot me a message.

@paulhudson6138

6 жыл бұрын

Brandon Gray shit I wish I knew they were here in town! Would have been cool to meet

@BGray478

6 жыл бұрын

Paul Hudson the Alabama Army truck episode was filmed mostly at Off-Road Connections in Fultondale, I pass by there on my way to work every day.

I am in the process of swapping a Ford 5.0L into a 1992 YJ. I'm scared

Build the 4.2 or put a 5.9 magnum if you really want to upgrade.

I like the Chevy 4.3 5.0 and 5.7 and him going with a 305 is better than say the lt with the optispark those things are turds

Daily mine dish string low aid make associate isolate gifted environment.

hey guy !!buy a k5 and youre done!!

If he wants 200hp just put a 4.3 in it. If he wants more get a 350.

@GreenJeep1998

6 жыл бұрын

Allen McKinney or he could just put a 4.0l in it, those are close right off the shelf, and everything should be easier to swap.

IF YOU GO WITH A V8 PUT A 454 OR OTHER WAYS STAY THE WAY IT IS , THE 4.2 IS NOT BAD MOTOR , NOT THAT MUCH OF A DIFFERENCES THE 4.2 AND THE 305

305 hemi of bust

Had a 305 once made a good boat anchor

Thought 100% of YJ’s came with high pinion dana 30s? TJ’s and later model XJ’s had low pinion? No? Is my whole life a lie?

Really ? Done this for years .

Why don't you guys put a 318 or a 360. It would be easier to swap and you'd actually have some power.

@HarrySituations

6 жыл бұрын

The guy writing in said he has a 305, they never said that was what they would run.

Cheap truck challenge

The transmission final drive ratio and the differential ratio determine how fast a vehicle will go. Not the size of the engine. I see morons on jeep websites who want to put disc brakes on an old Willys 2A or 3A!?! Why? Your top speed is 40 mph. Why do you need disc brakes?

LS swap!

@waterloo123100

6 жыл бұрын

Boundaries Unlimited Nah hemi's are a man's swap

@ramairgto72

6 жыл бұрын

What hemi? They new ones that dump the bottom ends out? Not a rod or crank issue, it's a block issue.

I like how most commenters are far from being helpful. instead they say do it my way insert my favorite engine here.opinions are like assholes everybody's got one,and It's what you are being when you say shit like that.

305? Why bother? Pile, get a real motor.

@herrick75

6 жыл бұрын

Wes R because you can't beat an American v8

@wesrr4036

6 жыл бұрын

herrick75 ......Nothing wrong with a V8, I love them but 305s are barely a V8. Should have done a hemi swap or a 350.

@shadesofbluee

6 жыл бұрын

Say that to someone with a built 334. Then imagine off-roading a Jeep with a built 334 under the hood. Easy 400 foot pounds, solid lowend torque and better fuel economy than a 350 would make it an ideal candidate for a little Jeep.

@wesrr4036

6 жыл бұрын

Now is a built 334 the same as a stock 305??? Really?

@shadesofbluee

6 жыл бұрын

Stock 305 still uses a 350 crank, it was designed with torque & fuel economy in mind. It just needs an upgraded cam and heads to do away with the power real limiters. But if you're willing to go that far, on an old engine, you may as well give it a real refresher. Thinking that even a 'stock 305' would not be good for off-roading a light duty vehicle is just ignorance.

The only reason to have a 305 in your vehicle is because it's the original engine that came in it.

@Welcometofacsistube

6 жыл бұрын

bigghoss762 k what?

dave chapelle in white face smh

go with electric motor for a high torque rock crawler

@GreenJeep1998

6 жыл бұрын

David Knauss That could be pretty awesome, especially with the motors and batteries that are now becoming available. There is a Korean company that converted a TJ or JK to electric sounded and acted a lot like a R/C Scaler!

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