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LT1 how to tell if it's real.

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Old 11-02-2021, 06:49 PM
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Gold Dragon
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Default LT1 how to tell if it's real.

https://yakima.craigslist.org/cto/d/...391977096.html

Found this on the local CL today. Find it hard to believe that a true LT1 can be had for this price. Wondering if anyone would like to weigh in on this one, and school me on the LT1 legend.
Old 11-02-2021, 08:55 PM
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68sixspeed
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Starting in 72 you can tell by the vin #, at least that tells if it started life as an Lt1… then check the block casting number, date, and stamp at front of block.

https://www.corvsport.com/1972-corvette-vin/

Last edited by 68sixspeed; 11-02-2021 at 08:59 PM.
Old 11-02-2021, 10:01 PM
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Dirty Dalton
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You might start looking here: https://www.corvetteforum.com/forums...rs-thread.html Odds are you'll get some good direction.

Tach redline 6500
2.5" exhaust
The U joints on the half shafts don't use U bolts, the use, and I can't remember the term for them, 'straps' nut and bolted together.
The SN as mentioned, only for 72
Intake manifold (looks correct in photo)
Holley carb
Only one fuel line
Casting numbers as mentioned.
Distributor not original
Engine info on console, but easily faked
Screw in rocker studs (have to take a rocker cover off to see)
And at least 1/2 dozen more that I can't recall

Good luck!

Like this, but without the nuts.

Last edited by Dirty Dalton; 11-02-2021 at 10:33 PM.
Old 11-03-2021, 07:52 AM
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DD's list and the L in the vin for 1972 tells you and there has been a lot of LT1 questions like yours in the past, so you can search prior comments.
The price is real good if it has a LT1 engine and no rust damage for starters.If it is close enough to you, take a look.
Ad says it needs paint, look at the rear deck picture; are those bubbles in the paint? Hopefully that is water.
Old 11-03-2021, 09:26 AM
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IMHO by the time you spend the money to paint the car, you are probably better off with this 72 LT1: https://www.corvetteforum.com/forums...erior-30k.html
Old 11-03-2021, 04:21 PM
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Not enough in the pix to confirm, Winters Alu intake but no factory transistorized ignition, no AIR system, but AIR ex manifols,can't see what should be a Holley choke rtc, but looks tidy enough to pull that price just on what I see that is non LT if in nice shape and drives well.

Originally Posted by Gold Dragon
https://yakima.craigslist.org/cto/d/...391977096.html

Found this on the local CL today. Find it hard to believe that a true LT1 can be had for this price. Wondering if anyone would like to weigh in on this one, and school me on the LT1 legend.

Last edited by fstntq; 11-03-2021 at 06:11 PM.
Old 11-03-2021, 04:27 PM
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6500 red line on the tach...Wow. Seems like it's all about what's under the hood. I would assume the original LT1 350s would have a unique crank, rods, pistons and heads. Seems like a crap shoot when buying one, unless you pull the pan and valve covers to see what's inside. Could just be an LT1 block with cheap aftermarket parts inside. Have any members successfully hunted one of these down and found one that's legit.? If you bought one new, that doesn't count.
Old 11-03-2021, 04:39 PM
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I know of a chick here in Calgary that has a '70 LT-1 in her Jeep YJ. Her husband-my best friend- put it in there just before he passed. The thing is stupid crazy........
Old 11-03-2021, 04:41 PM
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72 LT1's did not have transistorized ignition.
Old 11-06-2021, 10:11 PM
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Checking the 5th digit in the VIN is an "L" is the sure test it started life as an original 1972 LT-1. All other items can be faked.

Last edited by PJO; 11-06-2021 at 10:13 PM.
Old 11-07-2021, 05:40 AM
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Mr D.
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Nothing alarming in that CL ad that would make me run away and it fairly priced. As for paint, not every car needs repainted just because it has a few flaws.

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