I have a LS-6 car with a very sad build sheet and wanted to get anyones opinion of the options to make sure it was a ls-6 car. I can make out the 6 fairly well on the coding but can read some other codes very well....does that guarnatee it is an ls-6 is my question.
Codes that are real clear
M-22 hd 4 speed, D88-stripes, g80-posi, gw8-4.11 gears, f41-perf suspension

ALso the vin is clear and block 104 in the sheet should be unique and it shows a DT for emmision tune label...is this specific to an ls-6?

Basically can you confirm from that info that it was an ls-6 car even though the ls-6 is somewhat deterirated?

Well with a M-22 is it a 454 car. either LS-6 or LS-5, not sure of the emissions decal though..others will chime in I'm sure. Good luck

ALbert

DT label was used on the L78 and the LS6 cars. Then I think sometime in March the LS6 cars went to an AZ label. Never heard of a L78 with a 22 so it probably is an early LS6 car. What is the production date on your cowl tag?

"gw8-4.11 gears"........................... you can read that?????
Somethin' ain't right.

Have you looked for a second build sheet? My Atlanta car had one under the RF corner of the front seat and another glued to the driver's side door panel.

"gw8-4.11 gears"........................... you can read that?????
Somethin' ain't right.

Have you looked for a second build sheet? My Atlanta car had one under the RF corner of the front seat and another glued to the driver's side door panel.

GW8 are 4.10 gears. Chevrolet never offered a 4.11 ratio in the Salisbury type rear ends. Older (55-64) GM Hotchkiss rear ends had a 4.11 ratio. :thumbsup:

GW8 are 4.10 gears. Chevrolet never offered a 4.11 ratio in the Salisbury type rear ends. Older (55-64) GM Hotchkiss rear ends had a 4.11 ratio. :thumbsup:

That's EXACTLY my point.............. just wonderin' if somebody made up a build sheet and goofed on that detail.

If the car is unmolested, does it have a return line to the fuel tank?

I could be wrong but I thought the early built LS6 cars did not have a return fuel line unless they had the NA9 smog control.

DT label was used on the L78 and the LS6 cars. Then I think sometime in March the LS6 cars went to an AZ label. Never heard of a L78 with a 22 so it probably is an early LS6 car. What is the production date on your cowl tag?


My 04-16 assembled car has an "AZ" code.

I could be wrong but I thought the early built LS6 cars did not have a return fuel line unless they had the NA9 smog control.

I've never seen one with a return line, but haven't seen any California cars around here either. That's the reason I mentioned it. Neither one of mine (Kansas and Atlanta) have a return line.

Thanks for help on it guys here is more it is an Atlanta 01D Car and I typed it wrong it says 4.10 ratio axle. I think it also has return fuel line...what cars do/dont have return fuel line? Any more thoughts on DT emmision labels?

My 04-16 assembled car has an "AZ" code.

All the examples I have of 70 Atlanta LS6 cars (4) have AZ as well.

I've never seen one with a return line, but haven't seen any California cars around here either. That's the reason I mentioned it. Neither one of mine (Kansas and Atlanta) have a return line.


Two fuel pumps were used on the LS6. The early cars have a single line from the gas tank to the fuel pump. If a build sheet is available for the car in box 33 will have number 727 which is a single line pump. On the later cars the build sheet will show 768 in box 33 which is a dual line pump set up for the return line.

Two fuel pumps were used on the LS6. The early cars have a single line from the gas tank to the fuel pump. If a build sheet is available for the car in box 33 will have number 727 which is a single line pump. On the later cars the build sheet will show 768 in box 33 which is a dual line pump set up for the return line.

I'd like to hear some other opinions on early vs late as far as return lines on LS6 go. I haven't plotted the timeframes of the cars I've encountered, but again, have never seen a known original LS6 WITHOUT California emissions that had a return line. With the exception of my Kansas City El Camino, it's highly possible that most of the LS6's I've seen were Atlanta cars including my Chevelle.

My LS6 is Atlanta built April 23 and it has the return line. Box 33 of the build sheet has 768 which is the fuel pump with the return line nozzle.

I have several build sheets here that are for LS6 cars, as well as some L78 cars. One LS6 car, built December 11th in Kansas City (no NA9) has a 727 pump. On a different build sheet for an April 6th (Kansas City) built LS6, has a 768 pump (also no NA9). On a March 10th Atlanta built LS6, it has a 727 pump. On a June 2nd Atlanta built LS6, it has a 768 pump. Another Atlanta built LS6 from June 30th is a 768 pump.
All the L78 cars, that I have build sheets for, have 727 pumps, all built in Kansas city, and all early cars.

Rick

I was wrong my car 01D does not have return line....any other thoughts on DT emmision labels has it ever occured on an LS-5 car? if not then that is all I need to know. Thanks!!

FWIW LS-6 Arlington, 05D build date, box 33 768 fuel pump.

I have several build sheets here that are for LS6 cars, as well as some L78 cars. One LS6 car, built December 11th in Kansas City
Rick

There was a member gathering build sheet info on the earliest LS6 cars produced at respective plants.There is reportedly an 11C Leeds car but the sheet has not been made available.Would you be willing to post a pic?. It would establish it as the second earliest publically documented car.

TIA

the dt lable is on cars without return lines az is with return line

lane91
It's an LS-6 buildsheet you're describing.
The 4:10 posi rearend ratio was only available behind the 1970 solid lifter engines,
thus the L-78-(3:55 too) & LS-6 Chevelle.
The L-34 & LS-5 could only get the 3:31 open or closed.
This includes the Elcamino-(3:55 too) & Monte Carlo.

The M-22 trans. was only possible on the LS-5 & LS-6 Chevelle.

The DT Tune label was used on the Solid Lifter engines that
were built with the 727 Fuel pump,thus L-78 & early LS-6 Chevelles.

Are the last two digits in the VIN# of this LS-6 you are looking at 50?

lane91

The M-22 trans. was only possible on the LS-5 & LS-6 Chevelle.



.............. and El Camino

Of course.. :)

If I can help,let me know. I have an Atlanta built, LS-5 car. It had 2 build sheets and I will be glad to check any code that may help. It has the M-22 transmission and 3:31 posi rear end.

I was wrong my car 01D does not have return line....any other thoughts on DT emmision labels has it ever occured on an LS-5 car? if not then that is all I need to know. Thanks!!

I just went and looked at my El Camino. Ironically it's 01D also. It does not have the return line. (like I already said) I'm gonna try to remember to look at the build date on the Chevelle tomorrow.

Thanks guys you guys are a wealth of info