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57 De Soto 392
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macedon
Posted 2019-07-10 4:22 PM (#584663)
Subject: 57 De Soto 392



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OK, for the purists just look away... nothing to see here.

I did look around a bit, did some searches and not a whole lot came up. So I am considering going with a 392 in my 57 De Soto 4dr hdtp. The motor is out of the De Soto... I even have the front clip off. The 392 came out of a 57 Imperial. Anybody here ever done this? Or know of a write up on it. I just want to know what I'm up against if I do decide to swap out the 341 for a 392. I also have the tranny that came with the Imp 392. I also have the drive shaft and rear end from a 58 New Yorker.

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Powerflite
Posted 2019-07-10 6:28 PM (#584667 - in reply to #584663)
Subject: RE: 57 De Soto 392



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The 392 should be able to mount to the same motor mounts and transmission, converter & plate as your DeSoto. Just pull the DeSoto motor and install the 392 in it's place. I recommend using the truck 4-bolt exhaust as the original '57 exhaust is the limiting factor that reduces it's output potential. And use a 30 degree angled oil filter. There really are no issues with making this swap, it's a bolt-in deal.

But the 4-bolt exhaust get's pretty tight in there so you may need to adjust those motor mounts a bit to make it fit well. But I found that a centered mount worked best on my car.

Edited by Powerflite 2019-07-10 6:32 PM
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mikes2nd
Posted 2019-07-10 6:35 PM (#584668 - in reply to #584663)
Subject: Re: 57 De Soto 392


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why swap a 341 hemi for a 392?
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macedon
Posted 2019-07-10 6:41 PM (#584670 - in reply to #584663)
Subject: Re: 57 De Soto 392



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Sweet. That's very encouraging. Thanks
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macedon
Posted 2019-07-10 7:22 PM (#584674 - in reply to #584668)
Subject: Re: 57 De Soto 392



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mikes2nd - 2019-07-10 5:35 PM

why swap a 341 hemi for a 392?


The 341 was taken apart for rebuild and the machine shop never finished and lost some parts. So I have an incomplete 341 and a running 392.
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ToMopar
Posted 2019-07-15 1:38 PM (#584858 - in reply to #584674)
Subject: Re: 57 De Soto 392



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macedon - 2019-07-11 12:22 AM

The 341 was taken apart for rebuild and the machine shop never finished and lost some parts. So I have an incomplete 341 and a running 392.


Dave, you are a lucky guy to have those motors.

Powerflite - 2019-07-10 11:28 PM

The 392 should be able to mount to the same motor mounts and transmission, converter & plate as your DeSoto. Just pull the DeSoto motor and install the 392 in it's place. I recommend using the truck 4-bolt exhaust as the original '57 exhaust is the limiting factor that reduces it's output potential. And use a 30 degree angled oil filter. There really are no issues with making this swap, it's a bolt-in deal.

But the 4-bolt exhaust get's pretty tight in there so you may need to adjust those motor mounts a bit to make it fit well. But I found that a centered mount worked best on my car.


Nathan, what kind of 30 degree oil filter is it. Only available for the 392 or other motors, too

Edited by ToMopar 2019-07-15 1:39 PM
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Powerflite
Posted 2019-07-15 2:46 PM (#584862 - in reply to #584663)
Subject: Re: 57 De Soto 392



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It is sold by Hot Heads. They work with all the early hemi and hemi based poly motors, including DeSoto. They sell vertical down, forward, and 30 degree up versions.

http://hothemiheads.com/oiling_system/oil_filter_adapter_30d.html


Edited by Powerflite 2019-07-15 2:48 PM
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