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Unread 09-04-2002, 01:09 PM   #1
jeepcj
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Join Date: Aug 2002
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Unhappy '66 CJ5 engine swap ?? how big should I go?

I just purchased a stock 1966 CJ5 and am looking to upgrade the engine (4 banger). I'm unsure of what modifications would be required to swap up to a V8.....looking at 304 or 350? any thoughts? also original 3 speed tranny any suggestions on upgradeing it? I'm leaning towards the 350 engine.

Other planned additions: 4'' lift, 33in tires and possible front and rear axel upgrades.


Thanks
John

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Unread 09-04-2002, 01:28 PM   #2
Steelhead
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If you want to go with a 350 Chevy, do a search and find Advanced Adapters they carry every thing that you will need for the swap.
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Unread 09-05-2002, 05:35 AM   #3
lynn
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The best thing you can do for that '66 is to install a 225 Dauntless V6. It was a stock option in '66, so bolt up is easy. This engine is small and light, but develops some kick-butt torque.
Learn more about the Dauntless V6 and the Early CJ5s (1955 - 1971) on Sparky's Early CJ5 Page:
http://incolor.inetnebr.com/asparks/
and our forum at:
http://www.forumco.com/sparky/
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Unread 09-06-2002, 03:47 AM   #4
Jeepnvegas
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I got a 225 cid in mine and it can really move the little Jeep. A conversion to a 231 or the chevy 4.3 liter can be done with mininal effort. In my personal opinion, I think the the frame is too small for a V-8. I have seen it done and some work good. But I would look into a small block 6.
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Unread 09-09-2002, 07:47 AM   #5
Scrambler82
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Cool

My first choice would be a 5.0L Ford, but the CJ-5 has small engine compartment so as much I do not like saying it, use a Chebby 4.3 V-6. I think it will deliver more power than the CJ-5 can handle.


Good Luck on your choice.
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Unread 09-09-2002, 09:40 AM   #6
onesojourner
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Quote:
Originally posted by Nuck'nFice
My first choice would be a 5.0L Ford, but the CJ-5 has small engine compartment so as much I do not like saying it, use a Chebby 4.3 V-6. I think it will deliver more power than the CJ-5 can handle.


Good Luck on your choice.
ive seen a 400 in there so i dont think 5.0 is going to be to big...
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Unread 09-09-2002, 11:12 AM   #7
Scrambler82
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Cool

Me Too, but the least work is what I was thinking about.

But if a 5.0 Ford will fit then "let it be".
The Ford is lighter than a Chebby 5.0 and smaller in OD.

A lot of choices, contact Z&M Products, then have 5.0L Ford Mounts and stuff.
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Unread 09-10-2002, 08:01 PM   #8
cadman
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65 CJ5, I threw a 258 inline 6 in, she was tight, had to do some work on the firewall and go with electric fan, but she runs good.
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Unread 10-14-2015, 05:45 PM   #9
biggiebiggs
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Jeepnvegas, What is needed to be done to swap to the Chevy V6. 4.3L I was looking to do that to my 66' CJ5 with the 225 engine. Its old but runs, thought about overhauling the original V6 or swapping it for the 4.3. what do you think and what is needed? tranny, adaptors, driveshaft, etc?
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Unread 10-14-2015, 07:09 PM   #10
StoneTower
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The thread is 13 years old....
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Unread 10-14-2015, 07:38 PM   #11
skizriz
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And jeepnvegas hasnt posted in eight years.
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Unread 10-14-2015, 08:01 PM   #12
biggiebiggs
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Any help here would be welcome...

I have a 66 CJ5. looking to swap out my V6 to a chevy 4.3 V6. Im not going on any jamboree or anything but using it as a drive around town/and towns over. So i need it to go on the highway as well as. I read Novak site and it doesnt tell me what is all involved with swapping engines. has anyone done a swap with a 4.3 from a buick V6. what parts am I going to need that Im not thinking of. Running stock parts right now. thinking of going with SM420, with any other adaptors may need to mount the 4.3 to the new tranny, will i need to shorten the driveshaft, if so it can not be permanent, only temp right? Will eventually have to get a new shaft? Any help her would be great.
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