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By rmk57 - 16 Years Ago
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I found a 312 from a Thunderbird from the air cleaner to oil pan, its clean and runs good and it also comes with a FOM trans. I was just wondering what would something like that be worth?
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By gritsngumbo - 16 Years Ago
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Hard to tell. Lot depends on how much you want/need it. How much is he (she) asking?
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By 55Birdman - 16 Years Ago
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Is it still in the car? How many miles? What are you going to do with it? out of car no more than $200. Hear it run $300 unless you are going to do something with it such as rebuild or modify it. trans about $50-100
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By rmk57 - 16 Years Ago
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It's out of the car and mileage is unknown. The air cleaner and rocker covers are worth $300 aren't they? My 57 Custom has a 272 in it now and I was thinking a 312 would be nice. The seller is asking $1000.00 and I haven't spoke to them how firm they they are on price yet. Thanks Randy
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By charliemccraney - 16 Years Ago
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First off, is it truly a tbird motor? If it is and it has all of the correct tbird parts then it might be worth that much for the assembly. If it simply has tbird valve covers and they are mistakenly advertising it as a tbird motor, then I'd pay a max of $500 for the assembly and at that price, all signs would have to point to a running engine and functioning transmission. I'd still be hesitant to pay $500 if I didn't hear it running in the car and see the car move under its own power.
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By suede57ford - 16 Years Ago
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90% of "312's" are not 312's. Anyone with a Y-block or Y-block powered car calls it a 312, because it sounds like it is worth more money. If it truely is a 312 and truely a complete '57 T-Bird Motor it is actually worth $1000, especially if you need a complete one for a T-bird. The tranny is not an easy sell, so don't count it as having value.
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By Barry L - 16 Years Ago
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If it's a t-bird motor... a couple of quick things to look for; 1 inch thick spacer behind the water pump, generator mounts in front of block,not along side, crank damper and pulley (s) are distinctly different than regular y-blocks. As for it being a 312...really hard to tell without taking the pan off or looking for the "dot" on the rear of the crank, which is hard to spot with the trans on. Don't pay premium $$$$$'s for it without being sure. If you don't need T-Bird specific parts, a 1000 $ is too high unless it runs fairly well. Just my opinion ,but it seems there are more 312's for sale than were ever built. Good luck Barry
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By rmk57 - 16 Years Ago
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I was researching 312's from y-block.com and block casting numbers are ECZ-6015-A,B,C,or E. Are these numbers specific for 312's?
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By mctim64 - 16 Years Ago
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rmk57 (11/12/2009)
I was researching 312's from y-block.com and block casting numbers are ECZ-6015-A,B,C,or E. Are these numbers specific for 312's? Those #s could also be on a 292, you would need to drop the pan and look for ECZ on the main caps. Also as mentioned earlier look for the "dot" on the flange. 
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By John Mummert - 16 Years Ago
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The casting number on the block doesn't help identify a 312. Any # used as a 312 was also used as a 292. There are some numbers that never were 312's, EBU EBV ECK ECG B5A EDB(Dearborn). I have never seen a C1AE 312 but won't swear they don't exist. ECZ-A or B or C , EDB-E(Cleveland) B9AE C2AE can all be 292 or 312 A real 57 312 will have the ECZ9425B intake If you can find the right buyer for real T-Bird parts a 57 engine is worth a lot, easily 1000.00 but you have to take the time to sell them. Dizzy-400 damper-400 oilpan-200 LH exhaust manifold-175 ECZ9425B intake-125. Prices will vary but you could sell off enough to have what you want for free.
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By 46yblock - 16 Years Ago
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suede57ford (11/12/2009)
90% of "312's" are not 312's. Anyone with a Y-block or Y-block powered car calls it a 312, because it sounds like it is worth more money. If it truely is a 312 and truely a complete '57 T-Bird Motor it is actually worth $1000, especially if you need a complete one for a T-bird. The tranny is not an easy sell, so don't count it as having value. At a show this summer there was a '56 F-100 with a big sign in front of it telling everything that had been done. Included on the sign was "Engine-Original 312".
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By mctim64 - 16 Years Ago
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46yblock (11/12/2009)
[ At a show this summer there was a '56 F-100 with a big sign in front of it telling everything that had been done. Included on the sign was "Engine-Original 312". That's one rare '56 F-100 
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By rmk57 - 16 Years Ago
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Here are pics of the engine.Don't know if you can tell if it's a 312 or not, maybe someone with a keener eye could spot something. Thanks for the advice anyway. Randy
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By charliemccraney - 16 Years Ago
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It's not a T-bird motor.
Weren't the T-bird specials that were available in cars 312s if they had the T-bird valve covers? The problem with that is how do you know if the valve covers are original to the motor.
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By GREENBIRD56 - 16 Years Ago
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Charlie's right almost anything can be bolted on - the valve covers and air cleaner are easy changes. Four blade fan is odd for a bird but some got changed due to breakage. If there is a LH exhaust manifold specific to the bird - casting prefix ECJ - and a tach drive distributor??? One inch spacer between the waterpump and front cover.......
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By bird55 - 16 Years Ago
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Looks to me like it has a passenger car pan. hard to tell from those pics.
Also has pass. water inlet.
Still might be a decent buy if it runs. the valve covers are valuable as is the air cleaner, A 292 is just fine, 312 is highly overated.
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By bird55 - 16 Years Ago
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Also just spotted a passenger dipstick. It's worth something, A $1000?, not to me
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By Bob's 55 - 16 Years Ago
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Wish the pictures were a little bigger... I don't think the water pump is spaced out either, the bypass hose does not look long enough. Also agree with the others, car oil pan, dip stick location, thermostat housing. Can't quite make out the timing chain cover...
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By PF Arcand - 16 Years Ago
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The photos aren't detailed enough. Also keep in mind that as noted the actual T.Bird engine had special pieces. However it could still be a 312, but not as valuable. Again.. check the crank flange, trans off for a detent with a short 5/16" dia dot. Or pull the pan and look for ECZ on bottom of the rods. If seller does not allow any of this, assume it's a 292. I'd walk away..
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By Jeffs54Merc - 16 Years Ago
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I too found a 1957 Thunderbird 312 w/tranny. This engine was pulled from a 1957 Fairlane 500, but we where told that it was a transplant. This engine is complete, except for the air cleaner. It also came with the power steering pump, 12 volt genny, starter, exhaust manifolds, and distributor. Not a bad find
Here are the markings that I have found so far.
Driver's side head - ECZ-G
Intake - ECZ-9425-B
Block - driver's side - ECZ-6015-C
Pass side - looks like 8A followed by a V with an o inside
The gen. is mounted in front of the block not beside it. It also has the Thunderbird valve covers.
I got this engine and tranny for $350.00 and it runs great, but has a little smoke at start-up, will need new valve seals. I was told by a long time Ford man that this did come from a Thunderbird. I will remove the tranny today and look for the dot.
I will post pictures later to
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By Ted - 16 Years Ago
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All 292’s and 312’s in 1957 Ford cars are classified as ‘Thunderbird’ V8’s. This does make for some confusion as everyone wants to believe their particular engine actually came from a Thunderbird when in reality it was from a car.
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By rmk57 - 16 Years Ago
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That was my next question,is there any difference between a Fairlane and a Thunderbird 312?From what I've been reading it sounds like there is. It could be a Fairlane 312 dressed in thunderbird acesseries. I'll have to see if the owner would drop the pan and look at the main caps/crankshaft. It would be better for him to know what he's selling anyway.
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By charliemccraney - 16 Years Ago
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A T-bird motor will have a different harmonic balancer, a different generator location, a water pump spacer, a different thermostat housing, a tach drive distributor, and I think a couple other things. As Ted said, T-bird valve covers were installed on car engines. It doesn't mean it's a T-bird motor.
If that motor came from a T-bird, the correct T-bird parts are long gone and passenger car parts are now installed. Basically, it is no longer a T-bird motor, if it ever was one, and it's certainly not worth $1000. Not to me, anyway.
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By Vic Correnti - 16 Years Ago
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The motor looks like it has the side breather which the thunderbird does not and it looks like the valley pan does not have the draft tube on it either. Probably not from a Thunderbird car.
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By Hoosier Hurricane - 16 Years Ago
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Thunderbirds used a rear sump oil pan, passenger cars front sump, trucks more a tub shape than a front or rear sump.
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By Jeffs54Merc - 16 Years Ago
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Here are a few pictures of the 1957 312 y-block we bought last week for $350.00 .
Here are the markings that I have found so far.
Driver's side head - ECZ-G
Intake - ECZ-9425-B
Block - driver's side - ECZ-6015-C
Pass side - looks like 8A followed by a V with an o inside
I took picture of all the markings, the last picture is the intake.
Also here is a new picture of the 256 y-block in my 54 Mercury with the valve covers installed.
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