C3 General General C3 Corvette Discussion not covered in Tech
Sponsored by:
Sponsored by:

1968 L71 427 435hp

Thread Tools
 
Search this Thread
 
Old Jul 3, 2017 | 04:35 PM
  #1  
ChadTanner's Avatar
ChadTanner
Thread Starter
Cruising
 
Joined: Jul 2017
Posts: 11
Likes: 0
Default 1968 L71 427 435hp

Hello guys,

I have a 427 engine that has been in my family since the mid 1970s . It's allways been referred to as a L71 Corvette engine. The problem is... It had a lot machining done to it in the early 1990s .Any numbers on the deck pad were machined off.

My question is..

What is it good for now? Is it only a super good Hot Rod engine, or is it still an engine that could be used in a Corvette restoration?
​​​​​​​https://stlouis.craigslist.org/pts/6202310219.html
​​​​​​
Reply
Old Jul 3, 2017 | 05:14 PM
  #2  
cv67's Avatar
cv67
Team Owner
15 Year Member
 
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Default

Youll hear lots of opinons on that one
Looks like someone tried to take a grinder to the heads at some point.

Had a 390hp 427 that was stolen (from bodyshop of all things)yrs ago cant believe what they cost these days.
Reply
Old Jul 3, 2017 | 05:23 PM
  #3  
v2racing's Avatar
v2racing
Melting Slicks
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2008
Posts: 2,666
Likes: 289
From: Spring Park MN
Default

You could try to raise the numbers on the pad with acid. The grain disruption from the stamping goes down a ways and will often show with acid applied to the pad. Otherwise, there is nothing that proves it was ever an L71.

Mike
Reply
Old Jul 3, 2017 | 05:37 PM
  #4  
ChadTanner's Avatar
ChadTanner
Thread Starter
Cruising
 
Joined: Jul 2017
Posts: 11
Likes: 0
Default

Originally Posted by cuisinartvette
Youll hear lots of opinons on that one
Looks like someone tried to take a grinder to the heads at some point.

Had a 390hp 427 that was stolen (from bodyshop of all things)yrs ago cant believe what they cost these days.
​​​​​​​Could you point out the grinding on the heads. I guess that I missed that... Thanks
Reply
Old Jul 3, 2017 | 05:44 PM
  #5  
ChadTanner's Avatar
ChadTanner
Thread Starter
Cruising
 
Joined: Jul 2017
Posts: 11
Likes: 0
Default

Originally Posted by v2racing
You could try to raise the numbers on the pad with acid. The grain disruption from the stamping goes down a ways and will often show with acid applied to the pad. Otherwise, there is nothing that proves it was ever an L71.

Mike
Thanks Mike.. I'm looking into this. I've heard of the highway patrol garage doing this before to verify stolen vehicles.If the numbers are found with acid .. What then.. There kinda still not there.

​​​​
Reply
Old Jul 3, 2017 | 05:53 PM
  #6  
v2racing's Avatar
v2racing
Melting Slicks
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2008
Posts: 2,666
Likes: 289
From: Spring Park MN
Default

Originally Posted by ChadTanner
Thanks Mike.. I'm looking into this. I've heard of the highway patrol garage doing this before to verify stolen vehicles.If the numbers are found with acid .. What then.. There kinda still not there.

​​​​
Get good photos of the numbers if acid shows them. You never know, someone may have the car the engine is from and would pay to get it back. I would say if the numbers are documented and the engine went back to the original car, it could be restamped.

It would be a longshot and some would disagree with the restamp. It could still be a period correct engine for a NOM 427 car.

Mike

Last edited by v2racing; Jul 3, 2017 at 05:54 PM.
Reply
Old Jul 3, 2017 | 06:11 PM
  #7  
ChadTanner's Avatar
ChadTanner
Thread Starter
Cruising
 
Joined: Jul 2017
Posts: 11
Likes: 0
Default

So.. Do you think this block / heads combo with correct casting numbers & date codes for a 68 L71 would still have some"corvette value" opposed to just another BBC hot rod engine.
Reply
Old Jul 3, 2017 | 10:26 PM
  #8  
bb62's Avatar
bb62
Le Mans Master
20 Year Member
Active Streak: 30 Days
Active Streak: 60 Days
Top Answer: 1
 
Joined: Dec 2004
Posts: 5,233
Likes: 419
Default

Unfortunately, the only real value of an original Corvette engine is when it is in the original Corvette vehicle, otherwise, it's just a curiosity.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

5 Best & 5 Most Overrated Corvette Track Packages of All Time!

 Joe Kucinski
story-1

Every 2027 Corvette Engine Explained

 Joe Kucinski
story-2

Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

 Verdad Gallardo
story-3

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-4

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-5

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-6

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
story-7

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

 Joe Kucinski
story-8

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-9

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
Old Jul 3, 2017 | 11:23 PM
  #9  
ChadTanner's Avatar
ChadTanner
Thread Starter
Cruising
 
Joined: Jul 2017
Posts: 11
Likes: 0
Default

Originally Posted by bb62
Unfortunately, the only real value of an original Corvette engine is when it is in the original Corvette vehicle, otherwise, it's just a curiosity.
hmm.. I kinda thought that. However, I also wondered what you guys done if something happened to your engine or maybe someone found a really nice early 68 427 car without an engine.
​​​​​​​ Would someone be better off replacing it with an engine like this that has the correct castings numbers and dates ?
Reply
Old Jul 3, 2017 | 11:48 PM
  #10  
7T1vette's Avatar
7T1vette
Team Owner
15 Year Member
Community Builder
Community Influencer
Top Answer: 5
 
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
Default

Your car has exactly the same value now as it had before the block was machined.....TO YOU! You know the history of the car and no one else really knows any different. Until you attempt to sell the car to someone else, don't fret over it. If you don't care, no one else should, either.
Reply
Old Jul 4, 2017 | 12:04 AM
  #11  
ChadTanner's Avatar
ChadTanner
Thread Starter
Cruising
 
Joined: Jul 2017
Posts: 11
Likes: 0
Default

Originally Posted by 7T1vette
Your car has exactly the same value now as it had before the block was machined.....TO YOU! You know the history of the car and no one else really knows any different. Until you attempt to sell the car to someone else, don't fret over it. If you don't care, no one else should, either.
The 68 vette was believed to have been totaled in the mid 70s. That's the story anyway.. That was a couple years before I was born. The engine has survived with my family since then and has been used to power numerous race cars and hot rods over the years. I recently aquried it from my nephew to help him fund a more modern engine build.

I guess my question is.. Is there any possibility a Corvette guy would have a use for it? Or is it only good for what it's been doing for the last 40 something years?
Reply
Old Jul 4, 2017 | 02:34 PM
  #12  
7T1vette's Avatar
7T1vette
Team Owner
15 Year Member
Community Builder
Community Influencer
Top Answer: 5
 
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
Default

If the engine is still serviceable and in decent condition, there are likely LOTS of folks who would be interested in it. But, it would only bring in Big Buck$ if it still had its original identification stampings AND the owner of the very car it came from wanted to build the car back in "original condition".

Since it no longer has those stampings, it's just another nice BB Chevy/Corvette engine.
Reply
Old Jul 4, 2017 | 02:53 PM
  #13  
cv67's Avatar
cv67
Team Owner
15 Year Member
 
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Default

OP unless someone just HAD to have that # I dont think its a big value killer but that guy wont be looking at yours anways

Theres only so many 427s running around period; to lots of us thats acceptable I mean come on its almost 50 yrs old how many have never been cracked apart. To others that number is everything

If I had a few extra bux Id love to buyit from you my original plan was to stick one in my Abodywould still like to.

I just cant wrap my head around thousands for an old block, others will in a hot second.

Last edited by cv67; Jul 4, 2017 at 02:55 PM.
Reply
Old Jul 4, 2017 | 02:55 PM
  #14  
ChadTanner's Avatar
ChadTanner
Thread Starter
Cruising
 
Joined: Jul 2017
Posts: 11
Likes: 0
Default

Originally Posted by 7T1vette
If the engine is still serviceable and in decent condition, there are likely LOTS of folks who would be interested in it. But, it would only bring in Big Buck$ if it still had its original identification stampings AND the owner of the very car it came from wanted to build the car back in "original condition".

Since it no longer has those stampings, it's just another nice BB Chevy/Corvette engine.
Thanks for all the advice guys. I appreciate everyone's opinion.

I've had the intentions of joining this forum for awhile as I do own a 95 roadster.

I guess, I could post my 68 427 engine in the c3 for sale section?

I'm in Missouri and if someone thinks they could use the engine for their covette project...The price is very negotiable, I only have it because my nephew was selling off heirlooms to fund his new project. I gave him a lot for it, because I love my nephew. I just want to find it an appreciating home and retrieve some of my money.
​​​​​​​
Reply
Old Jul 4, 2017 | 04:41 PM
  #15  
ChadTanner's Avatar
ChadTanner
Thread Starter
Cruising
 
Joined: Jul 2017
Posts: 11
Likes: 0
Default

Originally Posted by cuisinartvette
Parts section I guarantee someone would snap it up
Gonna be a mo or so before I have play $ but would jump at the chance to get one . Would be fun to do a something that looked like it came outta Traco rather than al the bling. Know a 454 block would work fine but want the real thing
Yep.. You could build a 427 with a 454 block... The 454 guys won't have a clue to why your motor is reving & making power a 1000 rpm after theirs quit pulling.
Reply
Old Jul 4, 2017 | 05:39 PM
  #16  
CanadaGrant's Avatar
CanadaGrant
Safety Car
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2006
Posts: 4,057
Likes: 421
From: BC
Default

Originally Posted by ChadTanner
Yep.. You could build a 427 with a 454 block... The 454 guys won't have a clue to why your motor is reving & making power a 1000 rpm after theirs quit pulling.
In 69 and 70 the #3963512 block was used for both 427's and 454's. Exact same block right down to the casting number.
Reply
Old Jul 4, 2017 | 06:33 PM
  #17  
mchar's Avatar
mchar
Race Director
15 Year Member
All Eyes On Me
Photogenic
Photoriffic
 
Joined: Oct 2007
Posts: 15,836
Likes: 90
From: Fairfield, VA
Default

I'm in Missouri and if someone thinks they could use the engine for their corvette project...The price is very negotiable, I only have it because my nephew was selling off heirlooms to fund his new project. I gave him a lot for it, because I love my nephew. I just want to find it an appreciating home and retrieve some of my money.
I honestly think this is the perfect thing to do. Might be surprised at how much $ you could get.
Reply

Get notified of new replies

To 1968 L71 427 435hp

Old Jul 4, 2017 | 09:57 PM
  #18  
20mercury's Avatar
20mercury
Safety Car
15 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2008
Posts: 3,755
Likes: 721
From: Lafayette Louisiana
Default

Originally Posted by v2racing
You could try to raise the numbers on the pad with acid. The grain disruption from the stamping goes down a ways and will often show with acid applied to the pad. Otherwise, there is nothing that proves it was ever an L71.

Mike
Interesting, what kind of acid do they use, nitric? any links for more info?
thanks.
Reply
Old Jul 4, 2017 | 10:57 PM
  #19  
ChadTanner's Avatar
ChadTanner
Thread Starter
Cruising
 
Joined: Jul 2017
Posts: 11
Likes: 0
Default

Originally Posted by mchar
I honestly think this is the perfect thing to do. Might be surprised at how much $ you could get.
​​​​​​​I posted this engine in the c3 parts for sale section. I had trouble posting the pictures, so I added a link to my cl ad that has pictures of the casting numbers, dates and ect. If anyone has questions, feel free to call or text me.

​​​​​​​ I've considered putting it on eBay with no reserve and just saying "letter rip, tatar chip"!
Reply
Old Jul 5, 2017 | 09:58 AM
  #20  
CA-Legal-Vette's Avatar
CA-Legal-Vette
Race Director
20 Year Member
All Eyes On Me
Loved
Community Favorite
 
Joined: Jul 2004
Posts: 12,708
Likes: 329
From: Scottsdale Arizona
Default

Originally Posted by ChadTanner
​​​​​​​I posted this engine in the c3 parts for sale section. I had trouble posting the pictures, so I added a link to my cl ad that has pictures of the casting numbers, dates and ect. If anyone has questions, feel free to call or text me.

​​​​​​​ I've considered putting it on eBay with no reserve and just saying "letter rip, tatar chip"!
I've had pretty good luck doing this. I've done especially well starting with a 99 cent opening bid. Gets avwhole bunch of folks involved in the bidding early on. Unfortunately, occasionally it will sell for 99 cents
Reply



All times are GMT -4. The time now is 08:04 PM.

story-0
5 Best & 5 Most Overrated Corvette Track Packages of All Time!

Slideshow: The 5 best and 5 most overrated Corvette track packages ever.

By Joe Kucinski | 2026-06-09 12:46:45


VIEW MORE
story-1
Every 2027 Corvette Engine Explained

Slideshow: Every 2027 Corvette engine explained

By Joe Kucinski | 2026-06-09 12:16:31


VIEW MORE
story-2
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.

By Verdad Gallardo | 2026-06-08 19:53:43


VIEW MORE
story-3
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-4
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-5
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-6
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-7
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-8
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-9
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE