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Unread 10-27-2010, 01:12 PM   #1
BeavisButthead
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1990 XJ Cherokee 
 
Join Date: Nov 2009
Location: Colorado
Posts: 7
350 Engine Swap

Ive got a fully built 350 and want to swap with my 4.0 any suggestions on how I should go about this

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Unread 10-27-2010, 01:20 PM   #2
ChicoXJ
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1986 XJ Cherokee 
 
Join Date: Oct 2010
Location: Chico, CA, California
Posts: 695
Be prepared to use the GM tranny, it will work much better for you. Also cooling will be a problem and will not be cheap. Basically you will end up changing everything before you are done. You will also need to vent the hood so you can cool it.
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Unread 10-27-2010, 01:26 PM   #3
jkh
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1998 XJ Cherokee 
 
Join Date: Apr 2009
Location: Longmont, CO
Posts: 855
All the information, and many of the parts, you need:

Novak Jeep Conversions - Home
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'98 XJ: UpCountry, bastard pack, 2" spacers, JK shocks, 31" BFG AT's
'81 Honda GL500
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Unread 10-28-2010, 11:34 AM   #4
450rracer22
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1990 XJ Cherokee 
 
Join Date: Jul 2010
Location: Harrison
Posts: 40
i actually just finished put a 350 in my 90 cherokee. it was a bit of a bear. the best thing you can get is an entire donor vehicle. i used a 97 silverado with the 5.7L and a 700r4. that way you can basically just swap everything under the hood over to the jeep. your deffinently going to need to go to a GM transmission for sure because a 350 will destroy a jeep tranny very very quickly. I would recomend a 700r4. if you have a 231 transfercase it will be fine, if not better get one or go better.. I had to do a bit of fab work on the front end to get the chevy rad and trans cooler in. i ran dual electric fans instead of the clutch fan. you have plenty of electrical power now. i made a cowl induction hood and it runs around 180. i would not recommend leaving the D35 in the rear if your going to wheel it at all. it will not hold up. i drivetrain upgrade of some sort is in order. the front will be fine unless your really beaten it or have bigger than 33intires on it. i would swap the rear for a ford 8.8 out of a 97-2000 explorer if you wanna do the sye kit or a 8.25 out of a jeep. its quite a project but worth it. i just got back from blackmountain in Harlan ky and i made it way more places with all the extra power. Oh and if the motor is a vortec the hood will most likely not close when your finished.
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Unread 10-28-2010, 02:38 PM   #5
jkh
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1998 XJ Cherokee 
 
Join Date: Apr 2009
Location: Longmont, CO
Posts: 855
Quote:
Originally Posted by 450rracer22 View Post
i actually just finished put a 350 in my 90 cherokee. it was a bit of a bear. the best thing you can get is an entire donor vehicle. i used a 97 silverado with the 5.7L and a 700r4. that way you can basically just swap everything under the hood over to the jeep. your deffinently going to need to go to a GM transmission for sure because a 350 will destroy a jeep tranny very very quickly. I would recomend a 700r4. if you have a 231 transfercase it will be fine, if not better get one or go better.. I had to do a bit of fab work on the front end to get the chevy rad and trans cooler in. i ran dual electric fans instead of the clutch fan. you have plenty of electrical power now. i made a cowl induction hood and it runs around 180. i would not recommend leaving the D35 in the rear if your going to wheel it at all. it will not hold up. i drivetrain upgrade of some sort is in order. the front will be fine unless your really beaten it or have bigger than 33intires on it. i would swap the rear for a ford 8.8 out of a 97-2000 explorer if you wanna do the sye kit or a 8.25 out of a jeep. its quite a project but worth it. i just got back from blackmountain in Harlan ky and i made it way more places with all the extra power. Oh and if the motor is a vortec the hood will most likely not close when your finished.
Any chance you did a build thread for the swap?

So you put the Chevy radiator in the XJ? How much fab was needed to fit it in? If it's not much, it'd be better than shelling out $500+ for the Novak one.
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'98 XJ: UpCountry, bastard pack, 2" spacers, JK shocks, 31" BFG AT's
'81 Honda GL500
Colorado Jeep Club Member #399
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Unread 10-28-2010, 04:52 PM   #6
450rracer22
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1990 XJ Cherokee 
 
Join Date: Jul 2010
Location: Harrison
Posts: 40
alot of fab work is needed. the Chevy rad is roughly 41in wide which takes you just inside the headlight buckets on the jeep. the core support must be redone completely as well as the grill and some of the doghouse. not runnign the clutch fan gives you alot more room . I would just get a new radiator if i had to do it again. if you run the dual electric fan setup there is really no need for that size radiator, but the bigger the better. i have herd of people using 4.3L chevy radiators and the dual fan setup and being fine.
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Unread 11-15-2010, 07:18 PM   #7
gregamuffin
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1998 XJ Cherokee 
 
Join Date: Dec 2008
Location: Amherst, Buffalo, NY
Posts: 148
do you think the chevy 4.3l radiator plus the dual electric fan setup would cool a gm diesel 6.2?
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Unread 11-15-2010, 11:30 PM   #8
g19n87r
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Join Date: Aug 2010
Location: east hampton
Posts: 17
a 97 chevy without a 4l60e?
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