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1966 Trim Tag help

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Old 05-24-2016, 11:54 AM
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Doug Harden
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Default 1966 Trim Tag help

I've been asked by a friend, to help document (& ultimately sell) a group of 4 different Corvettes.

One in particular, is a 1966 L79 coupe, Patriot Blue, Dark Blue vinyl int.

Need a little help with one of the trim tag codes.

I've got most of everything decoded, but what does the 'AC' mean after the 418 code?

Thanks!

Old 05-24-2016, 12:04 PM
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Originally Posted by Doug Harden
I've been asked by a friend, to help document (& ultimately sell) a group of 4 different Corvettes.

One in particular, is a 1966 L79 coupe, Patriot Blue, Dark Blue vinyl int.

Need a little help with one of the trim tag codes.

I've got most of everything decoded, but what does the 'AC' mean after the 418 code?

Thanks!

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Old 05-24-2016, 12:13 PM
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Originally Posted by Doug Harden
I've been asked by a friend, to help document (& ultimately sell) a group of 4 different Corvettes.

One in particular, is a 1966 L79 coupe, Patriot Blue, Dark Blue vinyl int.

Need a little help with one of the trim tag codes.

I've got most of everything decoded, but what does the 'AC' mean after the 418 code?

Thanks!

This one should be Trophy Blue. Is it a powerglide?

Last edited by Geralds57; 05-24-2016 at 12:41 PM.
Old 05-24-2016, 12:15 PM
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For model year 1966, 418AC indicates Dark Blue Vinyl Interior, Coupe, includes Automatic M35 transmission, and without A31Power Windows, or A82 Headrests, or N03 36 gallon fuel tank.

Larry
Old 05-24-2016, 01:42 PM
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Originally Posted by Geralds57
This one should be Trophy Blue. Is it a powerglide?
No, it's a 4 speed. I haven't been able to get under it to see the tranny #'s yet, but it looks very original and this owner wouldn't have changed it.

Was the L79 even offered with a PG?

Doug
Old 05-24-2016, 01:49 PM
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Originally Posted by Doug Harden
No, it's a 4 speed. I haven't been able to get under it to see the tranny #'s yet, but it looks very original and this owner wouldn't have changed it.

Was the L79 even offered with a PG?

Doug

It may be a 4 speed now, but AC ECL code is correct only on powerglide cars as the prior post says. and no, L79 was not available with a powerglide. engine and trans have most likely been swapped and an air conditioned L79 4 speed car is much more desirable and easier to sell than a 300hp powerglide car w/air

Last edited by midyear; 05-24-2016 at 01:51 PM.
Old 05-24-2016, 01:50 PM
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Old 05-24-2016, 01:51 PM
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Old 05-24-2016, 01:55 PM
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Well ****....just noticed that the first digit of the engine stamped VIN is a '6' not a '5' as on the VIN tag...but the last 6 digits are right?!?..damn. I'm I reading it wrong?

The owner has already suffered through a few strokes, this ain't gonna help......


**EDIT** It's an 'S', not a '5'...whew...

Last edited by Doug Harden; 05-24-2016 at 02:12 PM.
Old 05-24-2016, 01:58 PM
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Originally Posted by Doug Harden
Well ****....just noticed that the first digit of the engine stamped VIN is a '6' not a '5' as on the VIN tag...but the last 6 digits are right?!?..damn. I'm I reading it wrong?

The owner has already suffered through a few strokes, this ain't gonna help......
No, you're ok. Everything looks fine. It's a 66 not 65. HP suffix is a 350 hp with air and PS with a 4 speed, but somethings not right with the AC code. Obviously I'm missing something because the stamping looks pretty good but the paint needs to come off the pad. We need John Z

Last edited by Geralds57; 05-24-2016 at 02:08 PM.
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Old 05-24-2016, 02:07 PM
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While you are checking things, post up the engine casting number and the engine casting date. They are on the top rear of the block. One on each side. Does the car have factory Power steering??

Also post up the stamped numbers and codes on both sides (vertical) of the transmission. This should also have the VIN derivative and date of manufacture.

Also, what is the rear axle code stamped on the bottom of the rear case. Need both date and axle code.

Larry
Old 05-24-2016, 02:09 PM
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My mistake...took another look and that's an "S" not a '5'...whew...now to figure out the AC.....
Old 05-24-2016, 02:10 PM
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Originally Posted by Powershift
While you are checking things, post up the engine casting number and the engine casting date. They are on the top rear of the block. One on each side. Does the car have factory Power steering??

Also post up the stamped numbers and codes on both sides (vertical) of the transmission. This should also have the VIN derivative and date of manufacture.

Also, what is the rear axle code stamped on the bottom of the rear case. Need both date and axle code.

Larry
Will do , next time I'm down there. Cars are 90 minutes south of me. As you can see, it's on a trailer and really hard to get under, but I'll make it happen.

Doug
Old 05-24-2016, 02:12 PM
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I think the 5 you speak of is actually an S. Which is the assembly plant designater for St. Louis MO.

The digit before the S is a 6 which is the model year designater and that represents 1966.
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Old 05-24-2016, 02:12 PM
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Originally Posted by Doug Harden
Well ****....just noticed that the first digit of the engine stamped VIN is a '6' not a '5' as on the VIN tag...but the last 6 digits are right?!?..damn. I'm I reading it wrong?

The owner has already suffered through a few strokes, this ain't gonna help......
I'm not sure I understand your point or concern in that regard? As I read it, both the VIN plate and the partial VIN on the stamp pad indicate a 1966 car.

The VIN number is very near the end of '66 production, out of a total of 27,720 cars that year. That correlates to the body assembly date of July 26 and the engine assembly date of July 12.

The question about this car is the 4 spd trans vs the ECL code. If the engine and trans were swapped the block must be a restamp. Or - the ECL code was wrong from the factory...........?

Old 05-24-2016, 02:18 PM
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Originally Posted by tuxnharley
I'm not sure I understand your point or concern in that regard? As I read it, both the VIN plate and the partial VIN on the stamp pad indicate a 1966 car.

The VIN number is very near the end of '66 production, out of a total of 27,720 cars that year. That correlates to the body assembly date of July 26 and the engine assembly date of July 12.

The question about this car is the 4 spd trans vs the ECL code. If the engine and trans were swapped the block must be a restamp. Or - the ECL code was wrong from the factory...........?


Yes, I misread the VIN...it seems to be perfect.

The AC code is troubling... looks to be a factory trim tag and rivets...
Old 05-24-2016, 02:18 PM
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Originally Posted by tuxnharley
I'm not sure I understand your point or concern in that regard? As I read it, both the VIN plate and the partial VIN on the stamp pad indicate a 1966 car.

The VIN number is very near the end of '66 production, out of a total of 27,720 cars that year. That correlates to the body assembly date of July 26 and the engine assembly date of July 12.

The question about this car is the 4 spd trans vs the ECL code. If the engine and trans were swapped the block must be a restamp. Or - the ECL code was wrong from the factory...........?

The last letter of the engine build code on the pad is the only difference if the engine was originally a 327/300 and then converted to a 327/350. The transmission obviously would have to be new/different than original.

Larry

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Old 05-24-2016, 02:22 PM
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One other question...the car has AC, but the compressor is obviously an aftermarket unit, as are the hoses. The ducting on the interior look correct though? Short of digging down to the firewall are there any other ways to know if it's original or a good retrofit?
Old 05-24-2016, 02:24 PM
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Originally Posted by Powershift
The last letter of the engine build code on the pad is the only difference if the engine was originally a 327/300 and then converted to a 327/350. The transmission obviously would have to be new/different than original.

Larry

Right. If it was a 327/300 AT car it would have been either HO, or HR if it was an A.I.R. / California car.

Does that "P" in HP look a little funny........?
Old 05-24-2016, 02:28 PM
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Originally Posted by tuxnharley
Right. If it was a 327/300 AT car it would have been either HO, or HR if it was an A.I.R. / California car.

Does that "P" in HP look a little funny........?
Yes it does.

Larry


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