The Ford Barn

FLSTF · 07-31-2019, 01:19 AM

We have a 1939 Ford Deluxe with the original 221 CI in the car. We have a crack in the block and instead of trying to repair the 221, we found a 1940 Merc 239 bare block. From my research, the two blocks are basically the same.

My questions are, what engine parts are interchangeable? More importantly, which engine parts from the ford 221 will NOT fit on the 239 merc engine? Will the 1939 ford 3 speed transmission mount to the 1940 merc 239 engine without issues?

Any help and guidance is much appreciated.
Thanks,
Dave

FLSTF · 07-31-2019, 01:27 AM

Ken/Alabama · 07-31-2019, 02:25 AM

Everything will interchange including transmission and all engine components with the exception of the pistons. The 239 has larger bore. Easy swap.

alanwoodieman · 07-31-2019, 07:03 AM

NICE CAR! yes 2nd everything, it will all fit and you will notice the extra power

FLSTF · 07-31-2019, 02:59 PM

Ken, I appreciate the guidance. Now the fun begins

I have the old Merc crank, I'm having it checked out to see how true (straight) it is. It might be easier to polish the merc crank and save the money for some aluminum heads.

Thanks,
Dave

FLSTF · 07-31-2019, 03:00 PM

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Thanks Alan, this is exactly what we're looking for.

07-31-2019, 01:19 AM	#1
FLSTF Junior Member Join Date: Jul 2017 Location: Chattanooga, TN Posts: 13	'39 221 to '40 239 swap We have a 1939 Ford Deluxe with the original 221 CI in the car. We have a crack in the block and instead of trying to repair the 221, we found a 1940 Merc 239 bare block. From my research, the two blocks are basically the same. My questions are, what engine parts are interchangeable? More importantly, which engine parts from the ford 221 will NOT fit on the 239 merc engine? Will the 1939 ford 3 speed transmission mount to the 1940 merc 239 engine without issues? Any help and guidance is much appreciated. Thanks, Dave

07-31-2019, 01:27 AM	#2
FLSTF Junior Member Join Date: Jul 2017 Location: Chattanooga, TN Posts: 13	Re: '39 221 to '40 239 swap

07-31-2019, 02:25 AM	#3
Ken/Alabama Senior Member Join Date: May 2010 Location: Alabama Posts: 3,257	Re: '39 221 to '40 239 swap Everything will interchange including transmission and all engine components with the exception of the pistons. The 239 has larger bore. Easy swap.

07-31-2019, 07:03 AM	#4
alanwoodieman Senior Member Join Date: May 2010 Location: upstate SC Posts: 2,963	Re: '39 221 to '40 239 swap NICE CAR! yes 2nd everything, it will all fit and you will notice the extra power

07-31-2019, 02:59 PM	#5
FLSTF Junior Member Join Date: Jul 2017 Location: Chattanooga, TN Posts: 13	Re: '39 221 to '40 239 swap Ken, I appreciate the guidance. Now the fun begins I have the old Merc crank, I'm having it checked out to see how true (straight) it is. It might be easier to polish the merc crank and save the money for some aluminum heads. Thanks, Dave

07-31-2019, 03:00 PM	#6
FLSTF Junior Member Join Date: Jul 2017 Location: Chattanooga, TN Posts: 13	Re: '39 221 to '40 239 swap Sponsored Links (Register now to hide all advertisements) Thanks Alan, this is exactly what we're looking for.