Block Casting Number - What Does It Tell Me?
Thread Starter
Instructor
Joined: Dec 2006
Posts: 207
Likes: 0
From: Keller TX
Block Casting Number - What Does It Tell Me?
Hello, I have a 1977 Vette....350. I see a set of number on the block close to the fire wall on the drivers side. Can anyone tell me what they mean?
14016379
14016379
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Another important number is on the front of the motor. It's on a pad, the deck that the passenger head sits on, just forward of the head. That's the important block casting number.
I don't understand how to decipher these so I will
a bit.
I don't understand how to decipher these so I will
a bit.
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Here is a pic of the pad on my 400. The numbers were washed out by the flash but you can see the pad where they go.
The pad may be dirty, so try cleaning it or sanding it to get teh numbers to show through.
If you have no numbers the block may have been decked...where the upper surface has been milled off and the numbers are now gone.
The pad may be dirty, so try cleaning it or sanding it to get teh numbers to show through.
If you have no numbers the block may have been decked...where the upper surface has been milled off and the numbers are now gone.
Le Mans Master
Joined: Mar 2001
Posts: 6,640
Likes: 287
From: Ann Arbor Michigan
14016379 is the block casting part number and was used for 79 and 80' 2 and 4 bolt main blocks (L-48 and L-82). Source: "Corvette by the Numbers". Is your engine the original?
Thread Starter
Instructor
Joined: Dec 2006
Posts: 207
Likes: 0
From: Keller TX
Matt, Wish my motor was so clean...will be after the rebuild.
My 350 does not have a deck above the timing chain cover. I went back out and removed the chrome cover over the distributor. Found another number on there but hard to read and hard to reach for a cleaning.
I went to www.mortec.com and found info.
Casting Number
14016379
Size 350
Year 77-79
Main Cap Bot 2 or 4
Block Casting Date (this part makes me wonder)
G139
G = July (A-Jan, B-Feb, C-Mar etc)
13 = 13th day of the month
9 = Year of decade (1979)
Sounds like my motor was replaced....my car is a 77...but the casting date is 1979?????
Doug
My 350 does not have a deck above the timing chain cover. I went back out and removed the chrome cover over the distributor. Found another number on there but hard to read and hard to reach for a cleaning.
I went to www.mortec.com and found info.
Casting Number
14016379
Size 350
Year 77-79
Main Cap Bot 2 or 4
Block Casting Date (this part makes me wonder)
G139
G = July (A-Jan, B-Feb, C-Mar etc)
13 = 13th day of the month
9 = Year of decade (1979)
Sounds like my motor was replaced....my car is a 77...but the casting date is 1979?????
Doug
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Heh heh, the motor is clean because it's not in the Vette yet.
The pad isn't above the timing cover, but it is same height, just off to the passenger side of it. It's an extension of the deck that the passenger head sits on. Think of it like a porch on a house. The block is the ground and the head is the house.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
