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ON a 71 vette with the LS6 motor what numbers do you look for to be sure it is an LS6 and not just a 71-454 with a plate change on the console? Also what is the value of one of these that has sat in a barn(not a dry barn) for 25 years? I know that the brakes are all frozen and will not even roll right now, not sure the moter will turn over. What is it's value restored?
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Re: 71 LS6 t-top
If I am not mistaken an LS6 is "just a 71-454". I have a 72 LS5, 454. The LS6 and LS5 is just another designation of the 454 engine. The block will have a casting number of 3963512, Alternator of 1100543 unless it had A/C then look for 1100544, and lastly see if the vin number is on the block infront of the passengers side. The Alternator and block casting, carb and distributor are all good to look at to see if someone has been in the engine compartment changing things. This year could have come with a Holley or a Quadrajet.
Value......What someone is willing to pay.
I would look this thing over realy well. If the barn was not dry you could have pillar post that are rusty, frame could be fragile, and the floor pan could be rotten as well. Brakes and the like are easy fixes it is the fram, pillars and floor pans that can start getting you into trouble. If the engine is not original than you have a whole other ballgame. If anything is wrong with the frame and body and the engine is wrong, I would walk away. ....Speaking from experience on this one. Got one in the garage right now that I wish I had paid more attention when I bought it.
All the best.
Oh, I am in MI. If your close I would love to take a look at it with you. I can drive by a barn and not wander if something is in it. Would be kind off neet to actual walk into one and see. Might be able to give a little free advice along the way. My education has been expensive and I don't mind sharing a few lessons.
Brandon -
Re: 71 LS6 t-top
The LS6 has solid lifters and a Holley, and will have a CPW suffix on the stamp pad if it's a 4-speed, or CPX if it's an automatic; the hydraulic-lifter LS5 will have a Q-Jet and either a CPH or CPJ suffix.Comment
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Re: 71 LS6 t-top
Ahhh....some more info to fill in my missing pieces. I did not realize that they came in both versions, LS6 or LS5. Was '71 the only year that this happened? I often wandered why there were two carbs for this engine.
I am not well versed in engine michanics so please alow me to ask a silly question, why would the hp be greater with solid lifter?
Basicaly,it looks like the LS6 produced 425hp and the LS5 produced 365hp.
Lastly, why would the Holley be used on the higher hp engines? Looks like both higher hp engnes, the 350 and LS6 used the Holleys while the lower hp engines of the 350 and LS5 used Rochesters.
Thanks much,
BrandonComment
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Re: 71 LS6 t-top
Kris,
Besides what John has mentioned, there are several key physical differences between the LS-5 and LS-6 cars, the difference is a little more confusing if between an LT-1 and LS-6.
You can email me if you would like to discuss this further. Currently we have now located for the '71 LS-6 survey/registry 85 cars.Comment
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Re: 71 LS6 t-top
I had a LS-6 back in '74 as a daily driver4. With a HD tranny and a DD clutch, I suspect that it was also a ZR2. Bought it for $4200 and sold it for $4400/ One, not pristine, wemt through auction at BG last year and didn't sell at $230,000.
Ol' GeezerComment
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Re: 71 LS6 t-top
I believe the '71 LS6 also had aluminum heads and a low rise aluminum intake. If it's like any other of higher horsepower Corvettes I think it would also have a higher redline on the tach as compared to the LS5 version of the 454.
I'm sure there are many more little differences but an LS6 Corvette is quite desirable.Comment
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Re: 71 LS6 t-top
Aluminum heads on the factory LS-6; parts counter LS-6 had CI heads.Comment
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