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Old 01-31-2009, 08:06 AM   #1 (permalink)
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Default 1966 289 - How To Tell If Orig Motor?

I have a 1966 convertible. How can you tell if the motor is original? Thanks.
Joe
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Old 01-31-2009, 10:44 AM   #2 (permalink)
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I believe you need to pull the starter and get the numbers behind it. Then, compare that to the build date. The best you may get is that the engine was built at a proper time prior to the car so it would match as production moved forward.
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Old 01-31-2009, 12:20 PM   #3 (permalink)
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Default Re: 1966 289 - How To Tell If Orig Motor?

The car's VIN tells you which engine option it came with. The fifth digit is
the engine code. For '66 C is 289 2V, A is 289 4V and K is 289 4V high performance.
If the fifth digit is T the car was originally equipped with 200 6cyl.

To my knowledge you have no way to prove if the engine is the actual original.
As stated above you can determine if the production date is appropriate for
the build date of your car.

At some point K code engines were at least partially VIN'ed.

As far as I know proof that your (or any) car has it's actual original engine would
require continuous documentation seldom seen on even a high value historical vehicle.
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Old 01-31-2009, 01:20 PM   #4 (permalink)
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You can reach a level a certainty. I have a 66 c code, I was in touch w/ the p.o.'s, and there is also a small metal tag on the intake manifold, this gives some other engine info. If this has made it for 43 years it is a good sign the engine has not been fiddled with too much. There is another tag on the carb too....
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Old 01-31-2009, 01:30 PM   #5 (permalink)
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I agree but! I've rebuit my carb and put the tag back on. If I removed the manifold
I'd put the tag back on...you know where I'm going. If I replaced the short
block I'd put the tags on that were there to start with...maybe that's just me!
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Old 01-31-2009, 03:31 PM   #6 (permalink)
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I bought a very original looking 390 out of a T-bird once at a wrecking yard..It had all of the original metal tags in place and the proper casting #s and date code on the intake..A few years later I tore it down for a rebuild and discovered a 352 block and bottom end!..I guess somewhere over the years the top end complete with tags was swapped onto a different engine....Anyway my point is I never assume anything anymore..
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Old 01-31-2009, 05:12 PM   #7 (permalink)
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I was lucky enough to have contact with the original owner and my car is virtually untouched, which is what I wanted when I went looking for my mustang. I have since realized that I was very lucky in that my car was driven very easy, never beat on. It does need most of the rubber replaced...
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Old 01-31-2009, 05:19 PM   #8 (permalink)
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When did Ford start stamping the VIN on the top of the block, aft of the intake manifold?? (As with my 1968 302 4V)

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Old 01-31-2009, 05:31 PM   #9 (permalink)
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Default 1966 289 - How To Tell If Orig Motor?

My motor has the assembly date stamped on it in a few places. One place is on the oil pan gasket surface near the back. The other is on a flat portion of the block right below the head on the driver side. Mine has 7D17 stamped in both locations. Not sure if all were stamped in this manner but it can give you an idea without the need to remove the starter.

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Old 01-31-2009, 10:12 PM   #10 (permalink)
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Quote:
Originally Posted by franklinair
When did Ford start stamping the VIN on the top of the block, aft of the intake manifold?? (As with my 1968 302 4V)

Neil Hoppe
They were mandated to start stamping VINs in the block in 1968; I believe it was part of the Motor Saftey Act of 1968 (or whatever it was called). Ford did stamp *some* cars before that, but mainly hi-perf stuff.
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Old 02-01-2009, 08:32 AM   #11 (permalink)
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Quote:
Originally Posted by frdnut
I bought a very original looking 390 out of a T-bird once at a wrecking yard..It had all of the original metal tags in place and the proper casting #s and date code on the intake..A few years later I tore it down for a rebuild and discovered a 352 block and bottom end!..I guess somewhere over the years the top end complete with tags was swapped onto a different engine....Anyway my point is I never assume anything anymore..

For what it's worth the 60's FE motors had 352 cast into them,So maybe your engine was original?
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Old 02-01-2009, 10:32 AM   #12 (permalink)
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This is basic & old hat for most of us, but let's back track a little in case the OP isn't aware.

Ford used casting #'s starting with B in the 50's, C in the 60's, D in the 70's. (you see the pattern). The second digit was a number for the year in the decade. C6=1966, D2=1972 etc.

Many parts could have a casting number/part number that seems incorrect, ie too early by 1, 2, 3, or more years. This many not be a problem as many parts were cast/made and used on later cars.

What you look for are #s later than the production year of the car. They would very likely not be original.

Also, concerning 352, that was a truck engine, but don't fret. I had the same fear 20 years ago when I saw that on my 428CJ block. FE engines of that era all had that 352 cast into the block. It's scared the bejeezus out of countless car owners!


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Old 02-01-2009, 12:32 PM   #13 (permalink)
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would a 68 289 block actually have been cast in 68 ? ......... or did they use blocks from 67 and then switch to 302
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Old 11-29-2010, 10:37 PM   #14 (permalink)
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my motor says 04DR-6015-BA 6G10 12

guess its not the original? the first letter "0" by might a "D". cant tell.
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Old 11-30-2010, 09:22 AM   #15 (permalink)
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Your casting code is likely actually D4DR-6015-BA

I am guessing this is for your 67 and it has a 1976 302 block.
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Last edited by pprince; 11-30-2010 at 09:25 AM.
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