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Old 01-11-2010, 02:13 AM
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coreysg coreysg is offline
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Location: battle gound WA
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1969 Jeep waggy big block swap????

Hello, my name is Corey and I have a 1969 Jeep waggy. I did a full 3/4 ton swap (Chevy corporate 14 bolt, HD 44 front, 410 gears front and rear) with cross over steering, I have the original running gear which consists of: Buick 350/Th 400/Dana 20 tcase. I was planning on swapping the motor out for its older brother, a stock 455 out of a 1972 buick electra? My question is, will this work, and is this a good idea? I know the running gear (3/4 ton) can handle it but will the tranny and tcase take the power, and give me what i want to get out of it?

Thankyou for lookin into my post! Hope to get the most of the site
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Old 01-11-2010, 03:23 AM
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Gambler68 Gambler68 is offline
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You may want to get a stronger D20/Th400 adaptor (I believe AA and Novak each make one), and beef up the D20 itself (reinforced tailshaft housing at the least). the th400 can handle it itself, though may as well have it rebuilt at the same time. So sure, thats another 2K tossed in your rebuild, but at least it'll be done right and nothing will blow on the trail (hopefully). Just my opinion based on a lot of reading..TH400/QT owner here.
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Old 01-11-2010, 03:36 AM
snoopy snoopy is offline
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72 was the year that everyone dropped compression ratios, if it is stock you may be just fine.
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Old 01-11-2010, 04:28 AM
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pineymike pineymike is offline
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I've been running a 455/t400/d20 for 20yrs in a '79 cherokee 33"at's detriot in rear 3:73.The stock adapter has held up well wheeling has included mud,rocks&sand with a heavy foot anytime I need it,also many hard street launches surprizing many "street" cars the only thing I've done to help the "stock" adapter is keep all the mounts in good order and the tire size at 33"? maby thats why I've had no problems. Good luck have fun!
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Old 01-24-2010, 01:07 AM
cotakid cotakid is offline
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Join Date: Dec 23, 2009
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axle swap

Hay I have a 70 wagoneer I want to put a set of chevy 3/4ton axles under it how hard was it to do what all did u have to change to do it email me I would like to bs with you about it
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Old 01-24-2010, 09:32 AM
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380tom 380tom is offline
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As pineymike said replace your motor mounts and tranny mount and you should be fine the TH400/D20 setup is pretty stout. You shuldn't have any problems. Unless they are existing now?
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Old 01-24-2010, 11:49 AM
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wao wao is offline
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Big Block Buick

I did thhis swap to my 69 Super Wagoneer. Motor mounts had to be sectioned , engine/transmission/tranfser case shifted back appx 2", 4" body lift, relocated power brake unit closer to fender well, adapter plate between engine and trans needed some grinding to clear starter, and on and on. Well worth the effort, much better.
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Old 01-24-2010, 11:56 AM
cotakid cotakid is offline
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Sorry I was asking about the axles what will I have to do to put chevy axles under it
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Old 01-24-2010, 01:12 PM
joe joe is offline
 
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Might check with Zack from Z&M when he and Brad stuffed a 455 into a J-20. Seems I recall the D20 lasting mere nano seconds before it grenaded.
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