LS-6

[Will Kean]

I picked up a car that was advertised as an LS-6. All of the engine components had matching #'s. All were the right suffixes and had casting dates prior to when the car was assembled. The correct heads and intake were there along with the crank, rods, and pistons. The car has a m-21 with the orig. shifter missing. The car has alot of options, they are; leather, ps, pb, 3:73 rear, rear window defog, alarm, and fm stereo. The car had been hit in the pass rear and a crappy job was done on the repair. So the gas tank had been out before, and the build sheet was missing. The fellow I bought the car from was selling it from his relatives estate. He assured me that his relative was the original buyer of the car in 71. The buyer moved from TN to GA in 81. So the GA title only goes back that far. The seller said the car hadn't run in 25 years, and it shows. the odometer shows 41,000 miles. And the motor on the inside shows that to be true. The front coils still had the HV stickers on them. I think those are from BB with AC.

So I guess what my question is. Is there any way to tell if this is a real LS-6? The numbers match but everything else is missing. The emission data sticker on the fire wall is there. But I don't know if they are different for the different motors. The correct Tach is there but no data plate on the inside console. So any help on this would be greatly appreciated. It seems like a great mystery.

[Joe L.]

Re: LS-6

Will-----

Is the engine suffix code "CPW" and does the block look to be original to the car? If so, then it's likely an LS-6.

The option list that you described could all have been had with the LS-6 engine option, so there is no inconsistency there.

I wouldn't expect the "HV" broadcast code springs on this car, though. Is there any evidence that the car ever had A/C? That was NOT available with LS-6.

[Joe L.]

Re: LS-6

Will-----

Is the engine suffix code "CPW" and does the block look to be original to the car? If so, then it's likely an LS-6.

The option list that you described could all have been had with the LS-6 engine option, so there is no inconsistency there.

I wouldn't expect the "HV" broadcast code springs on this car, though. Is there any evidence that the car ever had A/C? That was NOT available with LS-6.

[Jim T.]

Re: LS-6

Will is the engine suffix is CPW, this is the suffix for the LS6 with manual transmission. You might look around under the dash and behind the radio for documentation on how your 71 was built.

[Jim T.]

Re: LS-6

Will is the engine suffix is CPW, this is the suffix for the LS6 with manual transmission. You might look around under the dash and behind the radio for documentation on how your 71 was built.

[Tom R.]

Re: LS-6

Will:

Does the VIN serial number and its build sequence (birthday) line up with the trim tag build date? Do the rivets look original? Is the Blue vehicle certification tag on the driver's side door jamb. I believe it was later (73?) when GM printed the m/YY date on the certification. But, if blue tag is there...VIN should match up with the windshield post tag. What's code on the emission sticker?

[Tom R.]

Re: LS-6

Will:

Does the VIN serial number and its build sequence (birthday) line up with the trim tag build date? Do the rivets look original? Is the Blue vehicle certification tag on the driver's side door jamb. I believe it was later (73?) when GM printed the m/YY date on the certification. But, if blue tag is there...VIN should match up with the windshield post tag. What's code on the emission sticker?

[Mark #28455]

didn't LS6 require M22? *NM*

[Mark #28455]

didn't LS6 require M22? *NM*

[Chas Kingston]

Re: didn't LS6 require M22?

Mine did, and a double-disc clutch, too.

Geezer

[Chas Kingston]

Re: didn't LS6 require M22?

Mine did, and a double-disc clutch, too.

Geezer

[Joe L.]

Re: didn't LS6 require M22?

Mark------

No, it did not. However, if you got an LS-6 as part of the ZR-2 package, then an M-22 was part of that.

One thing, though: I don't think that you could get the 3.70 rear gear ratio with LS-6 unless you ordered an M-22 rather than an M-21. With the M-21, I think the lowest rear gear ratio that you could get was 3.55:1. So, if this car has an M-21 and 3.70 rear, then that might be an inconsistency.

[Joe L.]

Re: didn't LS6 require M22?

Mark------

No, it did not. However, if you got an LS-6 as part of the ZR-2 package, then an M-22 was part of that.

One thing, though: I don't think that you could get the 3.70 rear gear ratio with LS-6 unless you ordered an M-22 rather than an M-21. With the M-21, I think the lowest rear gear ratio that you could get was 3.55:1. So, if this car has an M-21 and 3.70 rear, then that might be an inconsistency.

[Joe L.]

Re: didn't LS6 require M22?

Geezer-----

All LS-6 with 4 speed transmission used the double disc clutch.

[Joe L.]

Re: didn't LS6 require M22?

Geezer-----

All LS-6 with 4 speed transmission used the double disc clutch.