C2

[Hector G.]

I recently removed the instrument cluster from my 1966 corvette. What do the letters and numbers on the back of the cluster signify? Specifically the Larger red letters, in my case, "LD", and the numbers next to the words cluster, speedo and tach, also in red print. In addition, besides looking at the engine, is there another way of determing whether the car's horsepower was originally 400/390 or 450/425?

[Joe R.]

Re: C2

Hector,

Does your cluster have the LD, Cluster 6457983, Speedo 6455367-W, Tach. 6412222-W?

These numbers only designate what cluster you have in your 66. It only takes five screws to remove the cluster and change it to another one from another Vette.

Let me know what the numbers are and I'll tell you more about your cluster. The information given will not reflect what was in your 66 originally but will give you some hints to what it might have been.

Regards,

JR

[Rob M.]

Re: C2

JR---

I too have seen the letters on the back of the cluster of my 66 and wondered what they represent. There is no mention of them in the JG, Adams, or in the AIM that I can find. Do you have a simple list that coresponds with each? For example, 300 hp = ??, 350 = ??, 390, etc. Mine is a base 300, so I can't imagine why someone would have changed it.

Thanks in advance for the info.

Rob

[Hector G.]

Re: C2

JR,

Thanks for your quick response. I am a new NCRS member and will be updating my profile soon, now that I know how this thing works. You are correct as to the information on the back of my cluster. I took a photograph and I'm looking at it right now. The only additional information in that area is the letters AC followed by "- MADE IN US" Your absolutely right that it could have been changed. I've owned the car since 1984,and although it did appear to me that the instrument panel had been removed at some point, nothing else on the car appears to have changed.

I would appreciate any further information you might have on this topic. Thank you for your time.

Hector

[John H.]

Re: C2

Simply stated, the big sticker on the back has the "broadcast code" on it, which is how the assembler selected the correct cluster assembly for the car it was intended for. There were many different combinations as received from AC depending on engines/options, and the Broadcast Copy on the car had a 2-letter code in the "cluster" box which told the assembler which cluster to select. The one in the photo, with the "LA" sticker, is the original out of my '67 327/300 without U15; it's been restored, but the original date stamps and broadcast code sticker were retained.

[Hector G.]

Re: C2 Instrument Cluster

JR,

Thank you for your response. Being new at this I beieve I messed up yesterday and did not correctly respond to your response. That might explain why I have not heard from you yet. You are correct on the numbers. Those are the ones that appear on my cluster. What do they mean? Is there a reference for this information? Thank you for your help. Happy New Year!

Hector

[Hector G.]

Re: C2

Thank you John. Would you please tell me what the 2-letter code "LD", the code "6457983" after the word "CLUSTER", the code "6455367-W" after the word "SPEEDO", and the code "6412222-W" after the word "TACH." signify?

Thank you for your help.

Hector

[John H.]

Re: C2

I don't have the conversion table (although the cluster restorers do), but the 6457983 is the part number for the cluster ASSEMBLY as received from AC; 6457982 was the assembly number for the "base" cluster ("LA" label, 300hp, no U15), so 6457983 was another variation, most likely a tach redline variation for an optional engine. Speedos were different (two types - base vs. U15), and tachs were different (three different redlines, with and without U15), and the speedo and tach lenses were also different with and without U15. There were also two different oil pressure gauges, so you can begin to see how many different ASSEMBLIES there were as received at St. Louis, as all those different individual components were installed by AC, not by St. Louis.