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post #1 of (permalink) Old 12-14-2000, 01:19 AM
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Advice Well Needed on engine swap

First off, I have a 1878 CJ-7 with an I6, and quadra trac, and I think it has a TH400, not sure on that though. This is the whole story. I put on a 4inch suspension lift, and a 3 inch body lift. Next came 36inch Super Swamper, and a good set of rims. The lowered gears are on their way. But here is my dilema. I have a rather well built Chevy 350 sitting in my garage... Just sitting there, and with the tires I just put on my jeep, I decided to swap it in my jeep. But I'd really like to hear from someone who's done it or knows anything about it. I'm pretty sure i'll be doing buisness with advaced adapter, but i'm not sure. The local 4x4 shop thinks i'm crazy, and try selling me all this stuff I don't need, so I don't trust them. Anyways he told me I could do it without an adapter, that the engine would bolt up to the AMC TH400. I'd really appreciate any help in this matter. Spring is just 5 months away, and can't wait to take the top off again!!
Thank You


p.s. email me at [email protected] thank you again.

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post #2 of (permalink) Old 12-14-2000, 04:32 AM
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Re: Advice Well Needed on engine swap

sorry that th400 by amc.. will not bolt up to your 350... and do not forget about your off set rear axle.. if you decide to put a chevy tranny and transfer case in.. you will either be changing the rear axle.. or getting an adapter for some transfer case... the biggest problem with dropping in the 350 besides all that. is your radiator.. the outlet and inlet will have to be opposite than what you have..

84 CJ-7 401/T-18/D20/D44/D60w/4.10&Detriots/YJ frame & tub/35x16x15 Boggers
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post #3 of (permalink) Old 12-14-2000, 09:56 AM
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Re: Advice Well Needed on engine swap

I wouldnt do anything to alter the historical value of that 1878 CJ......hahahaha....i had to say it, before someone else did!!

Give me Jeep or Give me Death!!!

(Will trade functioning organs for CJ-7 or flatfender)
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post #4 of (permalink) Old 12-14-2000, 10:03 AM
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Re: Advice Well Needed on engine swap

I've never dropped a Chevy 350 in a jeep, but was told horror stories from someone who dropped a Vette LT1 in, and yes it did go in, yes you need to do all those modes, and there was a problem with the clutch and linkage, didn't like to bolt on that chevy tranny to well. If your not too attacked to the Chevy engine, sell it and build a 5.9L, that would be my $.02 .
and someone did beat me to the 1878 .. damm.

'74 CJ5/5.9L Holley 4bbl/3spd/31"/not running
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post #5 of (permalink) Old 12-14-2000, 10:03 AM
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Re: Advice Well Needed on engine swap

you dont need advanced adapters on this one. get a normal 2wd Th400 to go behind your chevy 350, since your th400 has an amc bolt pattern, then swap the tailshaft and housing to the Gm th400 to mate it to your Qtrack ( assuming you want to keep the Qtrack)

the radiator and mounts are the next issues.


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post #6 of (permalink) Old 12-14-2000, 11:36 AM
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Re: Advice Well Needed on engine swap

It's not that hard. Put the 350 in with a T350 tranny, adapter to use your t-case. Buy your motor mounts, T-case to tranny adapter from Hicks 4x4 (they sell AA parts at a great price), get a radiator from 4wd hardware or mepco (they make them for these swaps--and they will bolt right in with no mods), There is plenty of room. The mechanic who did my 350 swap in my YJ has done it to two other CJ's. I can give you his name and phone number if you want. He can give a lot of info plus Hicks 4x4 can tell you everything you'll need. It is well worth the money/time for the power difference!!!! I've tried to attach a pic of my motor--it is very dirty though.

89YJ-350V8,35" swampers,etc.
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post #7 of (permalink) Old 12-14-2000, 11:48 AM
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Re: Advice Well Needed on engine swap

If it were mine I would follow Ozark's advice. A Chevy bolt pattern 2wd T400 is fairly easy to find and it wouldn't cost much to have the tailhousing swapped from your existing T400. The T400 is much stronger than a T350 and you wouldn't need any adapters taking this route. Either route you take will require motor mount and radiator changes along with the wiring. An AMC V8 will bolt right in to the tranny you have. If you do go the adapter route don't buy direct from AA. Hick's and other AA dealers sell them at a lower cost than AA.

'75 CJ5,258 w/Howell EFI,T18a,4.27's,33's,On-board air,Warn 8274
post #8 of (permalink) Old 12-14-2000, 12:06 PM
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Re: Advice Well Needed on engine swap

Thanks I think I know what I will be doing now. I think that was what the local 4x4 shop was trying to explain to me. Thanks for your help

post #9 of (permalink) Old 12-15-2000, 08:02 AM
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350 - TH400- Q-Trac strong enough?

Will a Q-Trac stand up to the power of a 350 for wheeling?
This is an option I'd consider for my short nosed early CJ-6 if I was to retain the offset D44 in the rear ......

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