The Ford Barn

Tudie 36 · 04-02-2026, 05:03 PM

IMG_1935.jpgThese are in a IMG_1935.jpg

IMG_1934.jpg1936. Has it been factory redone?

mcgarrett · 04-02-2026, 05:33 PM

Not sure if they are genuine Ford, but appear to be service replacement heads, judging from the late casting dates. The "40" prefix indicates heads for 1933 & 1934 V8.

Tudie 36 · 04-02-2026, 05:35 PM

That’s what I thought also

Kube · 04-02-2026, 06:47 PM

These are most likely service parts from Ford.

Terry,OH · 04-03-2026, 08:47 AM

The 36 could have flat top or domed pistons. The 40- indicates the heads are for flat top. The part number suffix "B" indicates the heads are cast iron. The 40- heads were used into 35. There are many different heads used by Ford. Suggest you look in the V8 Club restoration book for 35-36 and it's updates on the club form.

Kube · 04-03-2026, 12:22 PM

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Quote:

Originally Posted by Terry,OH

The 36 could have flat top or domed pistons. The 40- indicates the heads are for flat top. The part number suffix "B" indicates the heads are cast iron. The 40- heads were used into 35. There are many different heads used by Ford. Suggest you look in the V8 Club restoration book for 35-36 and it's updates on the club form.

Yes, many design changes were made in '35 / '36. However, only aluminum heads were installed upon the assembly line.

Model51 · 04-04-2026, 01:24 PM

On the assumption your "36" is a car, Kube is correct in that all production car engines in 1936 came with aluminum heads. The 40-6049/50-B heads were available for flat-topped pistons as service replacements for the production aluminum versions.

The cast iron 40-6049/50-B were the standard production heads for trucks from 1934 through 1936, so they are correct for those vehicles.

The embossed date tags indicate the heads are made as service replacements. Mid-1930's production heads made by Ford do not have date tags.

Kube · 04-04-2026, 02:51 PM

The embossed date tags indicate the heads are made as service replacements. Mid-1930's production heads made by Ford do not have date tags.[/QUOTE]

highbeams · 04-04-2026, 08:47 PM

Thank you all for this information. My '33 has the replacement heads then.

Model51 · 04-05-2026, 07:48 AM

Kube - There are two pictures of the 40-6049-B head (looks like a duplicate photo) with a 10-1-48 date, and one picture of the 40-6050-B head with a 5-20-48 date.

Kube · 04-05-2026, 08:19 AM

Quote:

Originally Posted by Model51

Kube - There are two pictures of the 40-6049-B head (looks like a duplicate photo) with a 10-1-48 date, and one picture of the 40-6050-B head with a 5-20-48 date.

I'm going blind... no other excuse. Well, maybe one more... I'm goofy in the head.
Thanks

Model51 · 04-05-2026, 09:50 AM

Easy to do - I do it all the time.

Tudie 36 · 04-16-2026, 06:17 PM

thanks

04-02-2026, 05:03 PM	#1
Tudie 36 Senior Member Join Date: Dec 2021 Location: Rockford, Tennessee Posts: 126	Head numbers help IMG_1935.jpgThese are in a IMG_1935.jpg IMG_1934.jpg1936. Has it been factory redone?

04-02-2026, 05:33 PM	#2
mcgarrett Senior Member Join Date: Dec 2013 Location: Corsicana, Texas Posts: 1,551	Re: Head numbers help Not sure if they are genuine Ford, but appear to be service replacement heads, judging from the late casting dates. The "40" prefix indicates heads for 1933 & 1934 V8.

04-02-2026, 05:35 PM	#3
Tudie 36 Senior Member Join Date: Dec 2021 Location: Rockford, Tennessee Posts: 126	Re: Head numbers help That’s what I thought also

04-02-2026, 06:47 PM	#4
Kube Super Moderator Join Date: May 2010 Location: Wisconsin, USA Posts: 10,541	Re: Head numbers help These are most likely service parts from Ford. __________________ "I can explain it for you. However, I can't understand it for you". Last edited by Kube; 04-05-2026 at 10:52 AM. Reason: corrected my earlier (incorrect) opinion

04-03-2026, 08:47 AM	#5
Terry,OH Senior Member Join Date: May 2010 Posts: 5,394	Re: Head numbers help The 36 could have flat top or domed pistons. The 40- indicates the heads are for flat top. The part number suffix "B" indicates the heads are cast iron. The 40- heads were used into 35. There are many different heads used by Ford. Suggest you look in the V8 Club restoration book for 35-36 and it's updates on the club form.

04-04-2026, 01:24 PM	#7
Model51 Senior Member Join Date: May 2010 Location: Fairfax Station, VA Posts: 934	Re: Head numbers help On the assumption your "36" is a car, Kube is correct in that all production car engines in 1936 came with aluminum heads. The 40-6049/50-B heads were available for flat-topped pistons as service replacements for the production aluminum versions. The cast iron 40-6049/50-B were the standard production heads for trucks from 1934 through 1936, so they are correct for those vehicles. The embossed date tags indicate the heads are made as service replacements. Mid-1930's production heads made by Ford do not have date tags. __________________ 1935 157" 1 1/2 ton stake truck undergoing full original restoration 1936 131 1/2" panel truck rescue preservation Author of the 1935-1936 Ford Model 51 V8 Truck book published by the Early Ford V8 Club of America

04-04-2026, 02:51 PM	#8
Kube Super Moderator Join Date: May 2010 Location: Wisconsin, USA Posts: 10,541	Re: Head numbers help The embossed date tags indicate the heads are made as service replacements. Mid-1930's production heads made by Ford do not have date tags.[/QUOTE] __________________ "I can explain it for you. However, I can't understand it for you". Last edited by Kube; 04-05-2026 at 10:53 AM.

04-04-2026, 08:47 PM	#9
highbeams Senior Member Join Date: Dec 2014 Location: California Posts: 961	Re: Head numbers help Thank you all for this information. My '33 has the replacement heads then.

04-05-2026, 07:48 AM	#10
Model51 Senior Member Join Date: May 2010 Location: Fairfax Station, VA Posts: 934	Re: Head numbers help Kube - There are two pictures of the 40-6049-B head (looks like a duplicate photo) with a 10-1-48 date, and one picture of the 40-6050-B head with a 5-20-48 date. __________________ 1935 157" 1 1/2 ton stake truck undergoing full original restoration 1936 131 1/2" panel truck rescue preservation Author of the 1935-1936 Ford Model 51 V8 Truck book published by the Early Ford V8 Club of America

04-05-2026, 09:50 AM	#12
Model51 Senior Member Join Date: May 2010 Location: Fairfax Station, VA Posts: 934	Re: Head numbers help Easy to do - I do it all the time. __________________ 1935 157" 1 1/2 ton stake truck undergoing full original restoration 1936 131 1/2" panel truck rescue preservation Author of the 1935-1936 Ford Model 51 V8 Truck book published by the Early Ford V8 Club of America

04-16-2026, 06:17 PM	#13
Tudie 36 Senior Member Join Date: Dec 2021 Location: Rockford, Tennessee Posts: 126	Re: Head numbers help thanks