1965 L78 Impala Tachometer
 

Wondering if anyone could post a closeup picture of a 1965 7K Tach. I have one but not sure if it is original. Thanks.

Re: 1965 L78 Impala Tachometer
 

This tach came with a 65 Biscayne I bought several years ago and recently someone mentioned they thought it wasn't original,

Re: 1965 L78 Impala Tachometer
 

As soon as I can figure out how to download a picture I will.

Re: 1965 L78 Impala Tachometer
 

Picture of Tach is uploaded in member galleries. Take a look.

Re: 1965 L78 Impala Tachometer
 

Take a look on the Tachman site.....

Re: 1965 L78 Impala Tachometer
 

It could be for an L78 car. Is there a part number anywhere on it? It would probably be an ink stamp.

Re: 1965 L78 Impala Tachometer
 

ink stamp on back reads: 6412295

Re: 1965 L78 Impala Tachometer
 

Ok, that's interesting, my parts book doesn't list it! Close, but not that number. Are you sure the last number is a "5"?

Re: 1965 L78 Impala Tachometer
 

I'm showing Tachometer part #6412293 for your application.

Re: 1965 L78 Impala Tachometer
 

here is a pic of his tach...

http://img.photobucket.com/albums/v1...ntach7k001.jpg

Re: 1965 L78 Impala Tachometer
 

There is a '65 Impala tach on the Tachman site ---looks like this only with a lower rpm redline like on the lower hp 396......

Re: 1965 L78 Impala Tachometer
 

[ QUOTE ]
I'm showing Tachometer part #6412293 for your application.

[/ QUOTE ]

That's one of the ones in my parts book. Sometimes they don't hit that stamp square on and parts of a number may not be what they seem. There are 2 possibilities. It just depends on if it had transistor ignition.

#6412236- (396, 409)(H/Per., Sp. H/Per., w/4-SPD.)(exc.T/Ign.)
#6412293- (4-SPD. w/T. Ign.)(H/Per., Sp. H/Per.) (396, 409)

It would help to see a picture of the part number to see how evenly it was stamped.

Re: 1965 L78 Impala Tachometer
 

Thanks Belair62 for posting the Picture.

Re: 1965 L78 Impala Tachometer
 

I'll try to get a pic of part number posted.

Re: 1965 L78 Impala Tachometer
 

I saw the pic of a 6K tach on the tachman site but not the 7K.

Re: 1965 L78 Impala Tachometer
 

I will try to post a photo of my tach in the next couple of days.

Re: 1965 L78 Impala Tachometer
 

I'd appreciate it.

Re: 1965 L78 Impala Tachometer
 

View attachment; shows serial no. on back of 7K tach in question.

Re: 1965 L78 Impala Tachometer
 

Hi; Is it for sale?

Jim https://www.yenko.net/ubbthreads/imag...ins/3gears.gif

Re: 1965 L78 Impala Tachometer
 

I'll probably keep it with the car. I don't know what there worth anyhow. Just finding out more about.

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

Re: 1965 L78 Impala Tachometer
 

Thanks for the Picture of the 7K, very nice! It clearly shows a unique face plate inpression as opposed to mine which has the 6K impression as illustrated by Rainer.

So now I need to understand more about the stamp. Are you saying that the part number corresponds with a 6K tach and was never meant to be a 7K tach, that the face has been rescreened?

Re: 1965 L78 Impala Tachometer
 

Rick, I was only partially correct. Real_fast, the face is definitely from a 6K tach - that's for certain. I didn't notice the discrepancy in your part number beyond the last digit. The number stamped on the backside does not correspond to any of the 4 listed numbers as was indicated previously. The number on the backside of this tach is 6412295. There's one digit off in one of the last two positions - take your pick. Given that the face has been altered, I suspect that the stamp may also have been faked but with an error. The other possibility is a stamping error at the factory, as Rick suggested. In either case, this tach did not start out as a 7K unit.

http://www.shapeconsulting.com/cars/65tach.jpg

Re: 1965 L78 Impala Tachometer
 

That confirms it alright. I think it's silly someone would go through the trouble of stamping a fake number on the back. Anyhow thanks for the education. This info will be useful for others who want to know what they have and to be aware of fakes.

Re: 1965 L78 Impala Tachometer
 

real fast - The picture that you posted is a tach for a full size chevy with either the 396/425 HP engine (L78), or the 409/400 HP engine (L33). Both of these were solid lifter engines. In 1965, if you ordered a full size car with the 396 engine (either one), and a 4 speed trans., the tach can as standard equip. I ordered a SS convert. with the 325 HP engine and the tach was standard. I am guessing that the same applied to 409 cars. If you ordered a tach with any small block, or the 409/340 HP engine, the red line on the tach would be different. As mentioned on this post, there is most likely two separate part numbers for these two tachs. As you have probably found out, the higher red line tach is very difficult to find.
I finished a restoration in Oct. 2003 of a L78 impala convertible (bench seat 4 spd.), and was very fortunate in that the tach and other hard to find parts were not missing.

John

Re: 1965 L78 Impala Tachometer
 

Do you still have the convertible? If so I'd like to see a picture. Also is the red hardtop an L78 also?

Re: 1965 L78 Impala Tachometer
 

Another thought, I noticed that the 7K tach's were for those equipped with 4-speeds. Does that mean that none of these tachs were issued in L78's with automatics, or were L78's only equipped with the standard tranny?

Re: 1965 L78 Impala Tachometer
 

real fast - Actually, in 1965, the standard transmission for an L78 full size car was a heavy duty 3 speed. However, I have never seen or heard of a car produced this way. You could not get an automatic in 1965 (with the L78). I believe that you could not get an automatic with a solid lifter big block (any model), until 1968.

Yes, I still have the convertible, It is a blast to drive. It is a factory black on black with white top bench seat 4 spd (M21), with 4:10 gears out back. Believe it or not, the original owner was a woman grammar school teacher. She drove it back and forth to school for 20 years. Unfortunately, I am not computer literate enough to post pictures. Something that I need to learn.

John

Re: 1965 L78 Impala Tachometer
 

Yes the maroon car is a True L78 car.

Here is a shot of John's car.

http://shutter05.pictures.aol.com/da...EBggwU0060.jpg

Re: 1965 L78 Impala Tachometer
 

Beautiful cars. I would love to drive an L78.

I have a Biscayne and a 70 LS6 engine and was thinking of mating the two together. What kind of suspension upgrades would be needed? Also do you think orange like the color of the fruit would look good on the car? Right now it has no engine but the body is in beautiful shape.