Engine tag decipher
I located the engine tag fastened by the ignition coil bolt.
"352" and "67" seem obvious to me.
Can anyone help out the what the other numbers and letter signify?
Truck was built in Canadian Plant at Oakville
Last edited by Centennial F100; May 13, 2024 at 06:17 PM. Reason: additional information
https://www.fordification.com/tech/engineIDtags.htm
I think this means it was a replacement--scroll down to the "291" on that list.
F100/350(4x2),Warranty plate Y, 3 or 4 speed M/T, Replacement engine part assembly part # C6TZ.6007.AB
So I would guess that the original engine was replaced by Ford, probably under warranty, fairly early in the life of the truck.
How long have you had it and what history did you get from the prior owner?
Last edited by 85e150; May 13, 2024 at 07:44 PM. Reason: replace link
Thanks for the link, but I am unable to find the info you referred to. Would it be possible for you to give me the post number in the thread you linked me too?
As far as previous owners are concerned I have documentation of ownership by 2 previous owners. I am the third.
First owner lived in Ohio and owned the truck from March 1967 to November 2005. 88700 miles.
Second owner Live in northern Ontario, Canada and owned the truck from November 2005 to August 2018. 91100 miles
I have owned it since September 2018.
The second owner was not aware of an engine replacement, and I have tried in the past to contact the first owner with other question but no luck finding him.
Last edited by Centennial F100; May 13, 2024 at 07:46 PM. Reason: found what you referenced
https://www.fordification.com/tech/engineIDtags.htm
Had to be the first owner.
Ford warranty for '67 was 2/24 for "bumper to bumper", with exclusions, and 5/50 for powertrain.
https://www.fordification.com/librar...18/category/93
This would imply that it was a replacement engine under warranty. I'd love to know at what mileage it was replaced at to get a sense of how many miles are actually on the engine. I wonder how many miles the engine warranty would have been on the new truck.
Answered my own question on warranty period. I will assume it was replaced at 49,000 miles, so my current 92000 on the odometer is only 43,000 miles on the engine

1967 Ford Truck memorabilia / 1967-1970 Ford Warranty brochure | FORDification Factory Literature Library
Last edited by Centennial F100; May 13, 2024 at 08:21 PM. Reason: answered my own question
Good point, and I suppose I will never really know, based on your comment that it could be the same tag on both new and replacement engines. Below is the date data from the Marti report. It is a 3 speed manual, and built in the Oakville plant in Canada, but first sold in Ohio. I wouldn't know where new or replacement engines would have been built at the time, or if there are any clues I am missing on the tag. I understand that the year (6) and month (L) of production on the tag would be 1966, November.
Could an engine built the same month as the truck have made it into the truck? Just-in-time shipping from the engine plant, back in the day?
Trending Topics
Good point, and I suppose I will never really know, based on your comment that it could be the same tag on both new and replacement engines. Below is the date data from the Marti report. It is a 3 speed manual, and built in the Oakville plant in Canada, but first sold in Ohio. I wouldn't know where new or replacement engines would have been built at the time, or if there are any clues I am missing on the tag. I understand that the year (6) and month (L) of production on the tag would be 1966, November.
Could an engine built the same month as the truck have made it into the truck? Just-in-time shipping from the engine plant, back in the day?
Just for the sake of argument, let's say the truck was purchased and did have an engine issue that required a warranty replacement. That most likely would have occurred within the first 6 months, and since it didn't sell until late March, that puts it late Summer '67 before the problem likely arose. Then they would have had to deal with the dealer and the factory reps to ok the swap, then have an engine shipped in. A replacement engine would most likely have post dated the truck by several months. Just looking at this with this skiff of logic, this leads me to the original engine conclusion.
Ford Trucks for Ford Truck Enthusiasts
Marti Report - Build date November 22, 1966
Engine Tag - Code 291 and build date 6L, November 1966
Block Casting Date - 6L14, November 14, 1966.
Not that this is real important, but my truck is an unrestored survivor and I am just curious about it's history.
Engine tag and Marti report pics in previous posts. Block casting date picture in this post.
Edit: After some more reading of material from various sources, I guess it is possible that a block cast on November 14 could have been installed in a truck built 8 days later on November 22, if there was little or no cure time before machining and assembly of the engine.
Block Casting date
Last edited by Centennial F100; Jul 19, 2024 at 09:15 PM. Reason: additional comment
This forum continues to help me with questions I have about my truck!
Not that, this is a huge deal to me one way or the other, but it seems to me that it is possibly a warranty replacement. Where are Sherman and Peabody when you need them!
Who's old enough to remember this?
This date code thing has been extensively researched by the Mustang community, which I have been a part of for 50 years. Sure, it's possible that what number dummy said that "it could be" (emphasis mine) 3-12 months before an engine was installed from build time, it is definitely not the norm. As fast as cars and trucks were being built, engines built and shipped around, there's always the possibility of an engine being shoved in a corner as the ones in front and restocked got used before the ones in the back got grabbed, so by the time it was finally installed it was older than typical.
Typically engines were installed within 30 days of casting. Most of the time much less. The Mustang experts will question anything more than 30 days as possibly not original without other supporting docs. Again, my own personal car had a 289 block cast in Windsor December 29, heads cast the first week of January, assembled then shipped across country to San Jose, California and installed in my Mustang by January 19, less than 3 weeks (closer to 2, actually) start to finish. (Marti report says it was built 4 days early) It's certainly conceivable your engine could've been cast, built and brought across the river for installation in a week.
As original as your truck is, I would not discount it. Make the nay-sayers prove different. I'm still standing by it. That's my 2c, based on what I know and believe. YMMV. All I can recommend is, embrace your originality and try not to overthink this.

PS, I'm old enough I grew up with Sherman and Peabody.
This date code thing has been extensively researched by the Mustang community, which I have been a part of for 50 years. Sure, it's possible that what number dummy said that "it could be" (emphasis mine) 3-12 months before an engine was installed from build time, it is definitely not the norm. As fast as cars and trucks were being built, engines built and shipped around, there's always the possibility of an engine being shoved in a corner as the ones in front and restocked got used before the ones in the back got grabbed, so by the time it was finally installed it was older than typical.
Typically engines were installed within 30 days of casting. Most of the time much less. The Mustang experts will question anything more than 30 days as possibly not original without other supporting docs. Again, my own personal car had a 289 block cast in Windsor December 29, heads cast the first week of January, assembled then shipped across country to San Jose, California and installed in my Mustang by January 19, less than 3 weeks (closer to 2, actually) start to finish. (Marti report says it was built 4 days early) It's certainly conceivable your engine could've been cast, built and brought across the river for installation in a week.
As original as your truck is, I would not discount it. Make the nay-sayers prove different. I'm still standing by it. That's my 2c, based on what I know and believe. YMMV. All I can recommend is, embrace your originality and try not to overthink this.

PS, I'm old enough I grew up with Sherman and Peabody.

I will concede that your well informed 2c is likely correct, but the engine tag code that points to a warranty replacement is a niggling thought in the back of my mind. You are correct that I may be getting too deep into the weeds on this. No more sleepless nights!

Also Wayne











