Hello all!

Can anyone tell me the location of the engine serial number (the stamped in # not the cast in #) on a 1971 400 motor. Is it at the back of the motor??

Thanks,
Allan

 

Front right side, about an inch up from the bottom

 

That's not a "serial number," though. It's the engine's build date code.

I've never seen a serial number on a 351M/400 block.

 

Did you ever find ouy where the serial # is located if so can u please tell me

 

Did you ever find location of serial # if so can u tell me where it is

 

Maaaybe we just don't care because the 400 wasn't an optional engine in the F-series until 1977. So look in a Chilton's or something. I think you're looking for the motor number.

 

351C, 351M, or 400 Ford Engine - What is the difference? - FordMuscle
This has a lot of info on the 400. I just learned that the factory retarded the timing for gas mileage. I am purchasing a aftermarket chain and possibly a mild cam. Hope that the piece will help you.
I just noticed that this was started a couple days ago Oh Well someone can use the info besides it is still early and I am buzzed with caffeine

 

Unlike the GM camp Ford only put partial serial numbers on a few engines, Boss 302 and Boss 429 come to mind.
Most of the engines only had the standard casting numbers on the engine components.
Ford did put a little aluminum tag on engines with some info on it, it was usually bolted on with the coil bracket, a lot of times when the coil was replaced that little tag disappeared.

 

http://grantorinosport.com/BubbaF250/ has a lot of info on the 400.
Ford never put a retarded cam timing 400 in a pickup. What you just learned is wrong. See attachment.
R.

 

Nice job 15 years later........

 

Somewhere around 67or 68 maybe a little later Ford started stamping a partial VIN # on the back of the block just below the cylinder head on the drivers side, they also stamped it on the top of the transmissions. It's not really a serial number but you can determine if the engine and transmission are original vehicle they are in.

 

looking at engine mine is on the left of the oilpressure sender there is a small flat raised area about 3/4"x1.5" its there on my aussie owned
400m

 

This?

 

Partial serial numbers would be on the coil bracket tag
Ford has always used a coil bracket tag
I can tell you, the correct coil tag for a Boss 302 will cost you about a thousand bucks if original

 

That's good to know they did that in Australia also. It is useful to see if the vehicle has the original engine and transmission. All the manufactures started doing that at the request of the insurance companies to help identify stolen vehicles. In the US truck engines were not always stamped until sometime up into the 1970's but car engines were starting in the late 60's. I pulled a 4V Cleveland with a C6 from a 71 Torino and both the engine and trans had a partial vin that matched the car. About that same time Ford started stamping the VIN on the inner fender aprons also.