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

another CODE id. question

Thread Tools
 
Search this Thread
 
Old Nov 23, 2025 | 02:59 PM
  #1  
mbp's Avatar
mbp
Thread Starter
Racer
All Eyes On Me
Liked
Loved
Community Favorite
 
Joined: Sep 2017
Posts: 334
Likes: 56
Default another CODE id. question

Hello. A riend recently bought a 1970 Chevelle and is confused about what exactly engine he has. On the pad at the front passenger side the larger numbers are V04115Q, perhaps a 0 not a Q The smaller numbers are 781141238. He believes those are the correct # and letters are correct but says it's hard to see due to where it is stored. The numbers on the block at the drivers side at the back are 3814678. Any help would be greatly appreciated. Thanks in advance
Reply
Old Nov 23, 2025 | 03:23 PM
  #2  
barkingrats's Avatar
barkingrats
1967 Pedal Car Champion
Supporting Gold
 
Joined: Mar 2020
Posts: 9,009
Likes: 4,166
From: US-PNW
Default

Originally Posted by mbp
Hello. A riend recently bought a 1970 Chevelle and is confused about what exactly engine he has. On the pad at the front passenger side the larger numbers are V04115Q, perhaps a 0 not a Q The smaller numbers are 781141238. He believes those are the correct # and letters are correct but says it's hard to see due to where it is stored. The numbers on the block at the drivers side at the back are 3814678. Any help would be greatly appreciated. Thanks in advance
This is a small block from Flint, Michigan, assembled on April 11th. There was no year indicated in this stamp. The "5" is probably an S. The code SQ is not in the Lime reference book, so it's likely not a Q and your friend needs to make sure there's not an additional letter after the "Q".

Here's the link to the Lime Book - it is sorted by code and provides usage years, size/HP, and application abbreviations:
Lime Book in PDF Format (a C2 Sticky)

@Nowhere Man is knowledgable on Chevelles to decipher the 781141238.
The site NastyZ28 has a lot of info on the block casting numbers and their date ranges of use (probably #3814671, not #3814678)
Reply
Old Nov 23, 2025 | 04:27 PM
  #3  
Nowhere Man's Avatar
Nowhere Man
Team Owner
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Feb 2003
Posts: 53,992
Likes: 9,355
From: Sitting in his Nowhere land Hanover Pa
2024 C2 of the Year Finalist - Unmodified
2015 C2 of Year Finalist
Default

A picture would help. The other set of numbers are the vin stamp but it's incorrect as there will be a assembly plant and that will be a letter
Reply
Old Nov 23, 2025 | 06:00 PM
  #4  
gbvette62's Avatar
gbvette62
Race Director
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2000
Posts: 12,642
Likes: 3,103
From: Shamong, NJ
Default

Besides rechecking the numbers on the stamp pad, your friend needs to recheck the casting number too.

3814678 is the casting number for a 62-64 409/380 and 409/400 single 4 bbl intake manifold, it was never a block casting number. The casting number is likely 3914678 which is a 68 small block 302/327/350 block, but not a block ever used in 1970 Chevelles or other 70 Chevys.

Finally the suffix code, whether it is 5Q, SQ, SO or some other combination of two letters, can't be a 70 Chevrolet suffix code as all 1970 suffix codes were 3 letters, not two.
Reply
Old Nov 23, 2025 | 06:22 PM
  #5  
mbp's Avatar
mbp
Thread Starter
Racer
All Eyes On Me
Liked
Loved
Community Favorite
 
Joined: Sep 2017
Posts: 334
Likes: 56
Default

Thanks for the replies. I think I'll Leave it to him to fiqure it out. The car is in storage on his in-laws property and he doesn't seem to be in a hurry to look over the numbers again. Thanks again.
Reply

Get notified of new replies

To another CODE id. question





All times are GMT -4. The time now is 02:04 PM.

story-0
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-1
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-2
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-3
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-4
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-5
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-6
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-7
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-8
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE
story-9
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE