Seems we're back at square one. I had presumed (silly me) that all the easy steps had already been taken.

 

If you can get your hands on a Corvette Parts and Illustration Catalog start scanning through and look for parts that are specific to the LS6. Like thermostat housings,lower pulleys,balancers ,ignition coils and so on and see if they are on your car. I'm not saying the items mentioned are different just using them as examples of things to look for. It will take some time and you will have to look for clues to the LS6. One clue for L88 parts hunting is HD = heavy duty. Just a thought.
Try googleing LS6....Try doing a search on CF for LS6 you might be surprised what you turn up.
If I get a min I will look around for you.

 

Check out post #4 in this thread.

http://forums.corvetteforum.com/c3-t...th-points.html

 

Another thought if someone has the CPIC on disc you might be able to do a search using LS6 and maybe it might bring up anything LS6 related.

 

Its very possible it still has the original rear wheel bearings in it. Most guys back then tried to stay away from messing with the rear bearings. I've renewed the bearings on 2 known L88s and both had "00" rated rear bearings inner and outer in them. I understand its a special hand picked bearing that is uncommon to find and is expensive. Its very possible Chevy would have put that bearing in the LS6. If you ever remove the rear bearings clean the grease off and look for the 2 letter rating. If you have the 00 I think this might be an added piece to the puzzle. Maybe GTR1999 could give some info here since he does a lot of rear bearings.

One other note about the 00 bearings. Above I said "known L88s". Last rear I was cleaning out the garage and was taking metal to the scrap guys because the prices were up. I used to save everything including bearings which I usually tied together as a car set with a piece of wire. I had the 2 sets of 00 from the L88s marked with red wire. For some reason I looked and saw 00 on a bearing and sure enough after cleaning them the whole set was 00. So if the 00 means anything I might have had another HP car come through that probably had an engine swap. Dang,sure wish I would have paid attention.

 

That is helpful to the OP. Think this is the kind of help he is looking for as he has admitted he is not real familiar with corvettes yet. People come on here asking for help and information and, if I was in his shoes I would be looking for answers too. It is great when they get helpful friendly advice instead of rude, arrogent, confrontational responses.
To the OP. A lot of the super HP cars had TI ignition and a different distributor number. Good place to start. These items are expensive and hard to find. The 1971 corvette LS6 manual trans car has a Magnetic pulse distributor with part # 1112076 stamped into the housing.

 

I've had my 71 LS5 since 1980- had 60k on it -put 40 k on it and it has sat for 25 years. Motor had been replaced-had a 403 bellhousing (indication of either a dual disc clutch w/ the LS6 w/ M22 combo or a smallblock)-had a 6500 redline-rear swaybar and an M-21 trans case (matched vin) w/ M-22 internals. Original big block or LT-1 hood w/ a L88 scoop fiberglassed on. No power anything (brakes/steering). I was thinking maybe this was a LS6 originally...

Pulled the gas tank and it confirmed it was originally a lowly LS5.

I'm thinking drop the gas tank-IT HAD a tank sticker on it when it left St. Louis. I have heard stories if extra ones in the dash. BUT really that's only way you will really know what the car came with. Most of these cars were beat on and parts changed as soon as they rolled off the showroom floor.

My $.02

Richard

 

Hells6,

There are indeed several unique parts to an LS6 Corvette. This is not common knowledge among a lot of Corvette experts. Would you please tell me your last 5 digits of your VIN. This would be the first place to start. I will ask you many other questions if this pans out.

 

First off thanks for the help guys, I am not a slobery guy, but I do apreciate the help. Last #s are 101427, I havent had time to do the research sugested because my job keeps me busy, not to mention my 9 year old and wife but I be getting on it asap

 

Hells6,

1971 model year VIN serialization starts with 100,000, your car is 1,427 out of 21,801 Corvettes built for this year. Unfortunately your car is way too early to be an LS6 optioned Corvette.

 

Have to agree with Early Shark. Your VIN number indicates a build date sometime in early Sept 1970. The first LS-6 units weren't produced for another 5 months.

 

I hope this wasn't purchased with an LS-6 price.

 

There was a 1226 Red Mass. with tank sticker.
Also a 1350 Yellow not sure about docs. in Europe
There was a 1499 on Mecum Canada
A 1905 in North Carolina with docs, "American street Machines"
An 0931 orange in Calif with docs
A 1720 coup in Pensil.
A 1499 in Fla
A 1090 coupe with docs.
I have been listing all LS6s for a couple of years I have seen for sale.
A lot of them came from the regestry, Barrett-Jackson a couple from Mecum. I have 35 of them listed. Not all but many of them are documented. Now I didn't call each one of these for the info, so if you ask am i sure , I am not sure about anything on any corvette's

 

4 bolt main I have cast # 3963512
heads cast #3946074
intake # 3963569
pad stamp T0819 CPW
Build Date B-01
Trim code 400
paint code 973
Does any of that make scence Excuse my ignorance, These are the numbers on the car

 

heads cast #3946074= correct number for LS6
intake # 3963569= correct number for LS6
pad stamp T0819 CPW = Tonawanda built engine, assembled Aug 19th. LS6 w/ 4 spd.
Build Date B-01 = trim tag date Sept 01, 1970
Trim code 400= black vinyl interior
paint code 973= Mille Miglia Red exterior

 

Mr Hammerhead: Where did you get the info LS6s were produced 5 months or later than mine? I would like to check that out. That might be the link.

 

Hum......... I hope this is not the same Mecum dude that CAR and DRIVER reported of back in the late 70's early 80's in hot water with law for car parts and underhanded issues? I think the article toted a LArry Mecum off to jail .............? According to the article..

Cheers ALL !!!!

I agree with the fellow at the begining of this thread .....once its decked .............it can be an anything. The dreaded DECKING of DOOM Many a DZ Z-28 block has died this way.

There are Soooooooooooamny people out there that wouldn't want to know the history of their C2 or early 3's

 

I recognize some of those partial vin's and they should be:
10931, 11905, 11499. Only EarlyShark can attest to them. The rest I haven't seen. There's always somebody claiming a LS-6 on the web.
Looks like from your documentation that you may have a non-matching motor.

What's the two letter designation on your emission label (top firewall driver's side)? What's your ignition coil number?

Got links to any of those other cars?

 

I have been involved with registering/locating original 1971 LS6 optioned Corvettes since March 1987, more than 22 years. None of those are legitimate VIN's, however if you add another digit which would be the actual car # some of those are in the LS6 registry/survey.

 

It has taken me many years to uncover and research the 1971 LS6 Corvette information. Researching Tonawanda engine facilities records, speaking with Fran Preve, talking to Gib Hufstader (Zora's right hand chassis engineer) and inventor of the dual disc clutch assembly. Getting information from GM sources on the 1971 LS6 engine option and so on. It did not come from one simple place. This was a complicated process that Zora had to manuever around in order to get this option on the ordering sheet for 1971. Its heritage comes directly from the 1970 stillborn LS-7 option.