Re: 1965 L78 Impala Tachometer
 

Hey real,
I'm sorry to ask, but could you take a well lit macro picture? It's hard to see the detail in the last number. If you can shoot it high-res too.

Thanks

Re: 1965 L78 Impala Tachometer
 

I'll do what I can.

Re: 1965 L78 Impala Tachometer
 

With the 396 introduced mid-year in '65 (Feb?), would a corresponding tach be produced as early as Nov?

The part number clearly ends in 5, which is the correct number for the lower redline tach. My bet is that its an original tach with a non-original (read: rescreened) redline.

Re: 1965 L78 Impala Tachometer
 

If you study the picture of the Tach, you can see indentions where the usual 6K tach face would be placed. Wouldn't the 7K tach have its own unique face plate imprint?
It would be nice to have a for-certain original 7K tach picture to compare with.

Re: 1965 L78 Impala Tachometer
 

The attachment is a close-up of the last digit, the best I can do.

Also wondering if 'L78Impala' could still post a picture of his 7K Tach. I'm still not sure whether my tach is original.

All off the replies have been much appreciated and helpful.

Re: 1965 L78 Impala Tachometer
 

I'd say that's an original #6412293 7K Tach you have there for a 1965 Passenger 4-SPD. w/T. Ign.w/H/Per.or Sp. H/Per 396 or 409.
I believe Delco-Remy manufactured these gauges originally?
Delco Remy did number some of their own parts differently.
They weren't always as the Chevrolet parts pages declared.
Example:
I have a set of NOS 1st design 1970 Chevelle Tail lamp lenses.The Chevrolet parts books say they used part #5963045-LH & 46-RH.The Original boxes show these same numbers stamped on them as well.
When you pull the actual tail lamp lenses out of their original boxes,they have #5963047-LH & 48 on them instead.These two numbers do not appear anywhere in Chevrolet parts literature,yet they do exist and are the proper parts for the 1970 Chevelle application.
This and yours are just some scarce examples of Delco parts numbering anomalys I have seen and heard.

Re: 1965 L78 Impala Tachometer
 

[ QUOTE ]
Example:
I have a set of NOS 1st design 1970 Chevelle Tail lamp lenses.The Chevrolet parts books say they used part #5963045-LH & 46-RH.The Original boxes show these same numbers stamped on them as well.
When you pull the actual tail lamp lenses out of their original boxes,they have #5963047-LH & 48 on them instead.These two numbers do not appear anywhere in Chevrolet parts literature,yet they do exist and are the proper parts for the 1970 Chevelle application.
This and yours are just some scarce examples of Delco parts numbering anomalys I have seen and heard.

[/ QUOTE ]

I'm going to disagree with you on this one, Rick. The numbers you're referring to on your lenses are numbers for individual components that make up the lens. Look on the front side and you'll also see numbers on each of the red rectangular inserts. Those three components together make up the item referred to by the part number, which can be found in the books. The components were never available separately, and thus were never referenced in assembly and parts manuals.

The number on the tach corresponds to an actual 65 tach part number, but with a lower redline. No anomaly here. Also, he mentioned that the indentations in the tach face that are supposed to be at the 10's are not in the right places. I noted the indentations in this edited photo. If you look closely, you can see them. This tach face was originally a 6K version, which corresponds to the part number on the backside.

http://www.shapeconsulting.com/cars/tntach7k001.jpg

Re: 1965 L78 Impala Tachometer
 

Well, that's very strange that the zoomed pic shows a pretty good "5" at the end of the part number. So, going by the parts book (it's not listed in my March 1966 parts book) I'm at a loss to say what it's for. It looks like a '65 tach but with that part number, https://www.yenko.net/ubbthreads/imag...lins/dunno.gif. My experience with 1966 tachs would lead me to the same conclusion: that the GM parts number stamped on the back of the gauge would be the same as what's on the box. I haven't seen them any other way. The tachs in 1966 were made by AC (as most if not all the gauges and senders were) and I would guess that the '65 ones were too. If I find out anything else I'll post it.

Re: 1965 L78 Impala Tachometer
 

Ok...here it goes. I did not get a chance to look at the number on the back. I've been having trouble with the photo.

Re: 1965 L78 Impala Tachometer
 

Yep...you're completely correct Rainer.
I was totally wrong and stated misinformation there.
I was wrong to compare this example to others not connected to it.Your explanation makes sense.
As for the Tach,you're right there too.
I still would like to know what No. is stamped behind Bills?
I'm Sorry for the misguided reply.
Rick

Here's Bills Pic again.
https://www.yenko.net/attachments/187667-tach.jpg