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Old 05-03-2019, 02:53 PM   #1
fftoddster
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Default Engine swap 46-48 flathead into a 37

What is involved in swapping a newer 46-48 flathead into a 37?

My 37 runs good but smokes and burns oil something terrible.
It is the original 21 stud 221 with a cornhusker T5 conversion kit.

I may have access to an engine out of a 46-48 pulled to do a street rod conversion from my neighbor.


Wondering what is involved in the way of different parts needed etc
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Old 05-03-2019, 04:25 PM   #2
Ol' Ron
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Default Re: Engine swap 46-48 flathead into a 37

The should be a direct replacement.
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Old 05-03-2019, 04:28 PM   #3
fftoddster
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Default Re: Engine swap 46-48 flathead into a 37

bellhousing? the 37 has integral bellhousing. Should clutch be the same?
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Old 05-03-2019, 04:46 PM   #4
petehoovie
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Default Re: Engine swap 46-48 flathead into a 37

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Originally Posted by fftoddster View Post
bellhousing? the 37 has integral bellhousing. Should clutch be the same?

The 46-48 has an "integral" bellhousing as well. Clutch should be no problem as well. The separate bellhousing was introduced in '49....
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Old 05-03-2019, 05:09 PM   #5
Lawrie
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Default Re: Engine swap 46-48 flathead into a 37

Bod drake makes a hose set to fit the later eng into the early car
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Old 05-03-2019, 05:14 PM   #6
Graeme / New Zealand
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Default Re: Engine swap 46-48 flathead into a 37

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Old 05-06-2019, 10:24 PM   #7
fftoddster
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Default Re: Engine swap 46-48 flathead into a 37

Would the headers, generator, fan, water pumps, carb that I have for 37 21 stud all work on 46-48 flathead?
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Old 05-07-2019, 05:59 AM   #8
36coupe
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Default Re: Engine swap 46-48 flathead into a 37

You can get an adapter to run the early distributor on the later engine I think
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Old 05-07-2019, 08:41 AM   #9
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Default Re: Engine swap 46-48 flathead into a 37

Quote:
Originally Posted by fftoddster View Post
Would the headers, generator, fan, water pumps, carb that I have for 37 21 stud all work on 46-48 flathead?
All the dimensions and bolts patterns are the same.
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