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Need to decide on engine for my Jeep



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Old 01-12-2009, 09:23 PM   #1
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Need to decide on engine for my Jeep

Background on the Jeep, it is '70 Kaiser Jeep DJ-5 (left hand steering), has had the roof and doors removed, and body trimmed up. Currently has the rear axle moved back 8" and the tub trimmed. Since this is an early model, it has the short CJ-5 front end. Axles are full width 9" rear and HP 44 front.

I was going to run a SBC with a TH350 and a D20 transfer case. I found an early 80's F250 local that I got very cheap, purchased it and liberated it of most of the drivetrain. The front and rear axles were toast, as was the 5.0 engine, but in good shape was the NP435 and BW1345 transfer case. I decided I rather use them instead of the auto and D20.

Now comes the powerplant part. I have considered running a homegrown turbocharged (250-ish hp) Buick 3.8L or a homegrown turbocharged (300-ish hp) 305 Chevy, by modifying a GM bellhousing as per http://www.novak-adapt.com/knowledge/ford_to_gm.htm . I have both engines and turbo setups on hand. I have also thought of running a turbocharged (350-ish hp) 5.0 Ford, as I have most of the parts to assemble one and the turbocharger setup for the SBC would be easily modified for it. Also, have a mostly built 472 Ford big block (460+.060) that is built to put out around 400 hp, short block is done just need to assembly it. Id rather keep the rig light, but I be damned if the big block isn't calling out to me.

Bash away.

Stevo
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Old 01-13-2009, 07:56 AM   #2
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Don't put the BB power infront of the BW t-case, the chain driven case won't last very long at all.

I say 472,NP435 and find you a NP205 to go behind the NP435. I didn't realize that the NP435 ever had a chain driven case behind them.



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Old 01-13-2009, 11:42 AM   #3
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The 1345 case was used in the '80-'89 Ford fullsize trucks, even going behind the 460/np435 in one ton trucks. To be honest, I am not thrilled about it be a chain drive case, but have read it is plenty stout. Maybe I need to reconsider using it.

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Old 01-13-2009, 06:22 PM   #4
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Worst case is you use it and it fails, then all you have to do is stick a 205, stak or atlas behind it.



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Old 01-21-2009, 10:00 PM   #5
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How about a 351C from ford. Tons of power. Great Engine. I have one for sale if you need it haha!!
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Old 01-21-2009, 11:48 PM   #6
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Id guess this will be trail only? Id consider the GM gen III family of motors. You can pick up a low mileage 5.3 with harness and comp for under a grand in most cases. factory with 285 hp and about the same tq, awesome reliability, can be ran at steep angles and parts can be found at any auto parts store which can help when your 500miles from home and broke. Get in contact with SLOWROCKR on here, he can set you up with a modified harness and flash your Pcm as well.

If you don't go with the Gen III my next suggestion would a sbc 350 not 305 w/ a turbo. Now that would be sweet. The 3.8 turbocharged are very sweet little motors as well.

Good luck and let us know what you end up with.
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Old 01-22-2009, 11:31 AM   #7
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Was looking for input on the choices I listed, as I have them (or most of them) already. As bad as I hate to admit it, I am worse than most women about changing my mind, have already decided to go back to the original plan of using a th350/dana 20 and the d44 in the rear, and whatever I can find up front until I make a narrow track d44 axle for the front.

The Jeep is to be for mixed duty, trail use and some street use in the summer. I mocked it up with the full width 9" in the rear, and it was just too wide. Looks like I'll be using either the Buick 3.8 or the SBC.

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Old 03-12-2009, 09:45 PM   #8
 
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Howdy, what are you going to do with the 153 Chevy II engine you are pulling out? I am in need of the exhaust/intake manifold for my daughters mild "Pink Pirate" 1969 DJ5. It will stay 2wd but I have swapped in the NP542 out of a Chevrolet School bus and have the pieces to assemble a 3.73 Sure Grip Dana 44 rear axle. Waiting on the 1410 yoke. Goal is to keep it under a ton, should be simple & crisp. Regarding your engine choices the 3.8 turbo sounds like the best balance of weight and power.
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Old 03-12-2009, 10:27 PM   #9
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if you want to use that np435 I say go with a 351w or the FE big block.

if you fry that TC I happen to know a guy with a bw1356(1 ton TC) he'd sell you cheap!
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