427 Block
Thread Starter
Burning Brakes
Joined: Sep 2005
Posts: 1,014
Likes: 11
From: Greenwich CT
427 Block
Hi guys,
I'm usually in the C2 forum but wanted some assistance with a block I most likely be selling in the near future.
I have a 69 427 block, which I will be selling during the Spring of 2010, does anyone know what a fair selling price might be?
The pad is blank, unsure if it is standard bore, will be selling as a
bare block.
(block is currently in my car & has no issues)
thx.,
Brett
I'm usually in the C2 forum but wanted some assistance with a block I most likely be selling in the near future.
I have a 69 427 block, which I will be selling during the Spring of 2010, does anyone know what a fair selling price might be?
The pad is blank, unsure if it is standard bore, will be selling as a
bare block.
(block is currently in my car & has no issues)
thx.,
Brett
Pro
Joined: Jun 2004
Posts: 561
Likes: 1
From: No longer in Heaven
need some info...
what is the cast number, what is the cast date? How do you know it is from a '69?
You can start there. If it's a valuable (meaning mid-year to '69) Corvette 427, according to the cast number, it may be valuable. Also, the cast date will tell you what year(s) it is appropriate for.
If it's a '68 or '69 Corvette 427, it could be quite valuable ($2,000-$4,000) to the right restorer.
Since you came here to the C3 forum, I am assuming it isn't a mid-year 427, but it could be worth even more if it was for a '67.
what is the cast number, what is the cast date? How do you know it is from a '69?
You can start there. If it's a valuable (meaning mid-year to '69) Corvette 427, according to the cast number, it may be valuable. Also, the cast date will tell you what year(s) it is appropriate for.
If it's a '68 or '69 Corvette 427, it could be quite valuable ($2,000-$4,000) to the right restorer.
Since you came here to the C3 forum, I am assuming it isn't a mid-year 427, but it could be worth even more if it was for a '67.
Melting Slicks
Joined: Nov 2001
Posts: 2,659
Likes: 7
From: Katy (Houston) TX
CI 7-8 Veteran
If you find it's nothing special send me a PM. I've got a NOM 427 block that could use replacing in the future. Not interested in originality so if it's a valuable block find someone who needs it for their restoration.
Good luck
Good luck
Pro
Joined: Jun 2004
Posts: 561
Likes: 1
From: No longer in Heaven
The casting date should be upside down near the freeze plugs, I think on the driver's side. It is not a rare block, but since it was used over 3 model years and at least 3 different models, there should be broad interest to restorers, if not great value.
Pro
Joined: Jun 2004
Posts: 561
Likes: 1
From: No longer in Heaven
31= 31st day (Halloween!!)
9=1969
depending on model runs (I think most start in the Sept-Oct months of the year previous to model year) and the fact that most blocks were cast several days to several months before being actually dropped in a car (NCRS actually gives up to 6 months between cast date and car build date), yes, very probable that this was for a 1970 model, which would make it certainly a 454, not a 427.
Check and see what Chevy models offered the 454 in 1970, but I do know that Corvette, Chevelle and Monte Carlo did, there may be others.
By the way, bake a cake, your block will be exactly 40 years old on October 31!!!
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
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
Pro
Joined: Jun 2004
Posts: 561
Likes: 1
From: No longer in Heaven
LT-1 Kid is correct...'69s were made through December of 1969, the first 1970 models came in January of '70.
Given an October 31 '69 cast date, it very well could have been used in a 1969 427 (and probably was). According to prevailing opinion as well as NCRS rules, there is a window of up to 6 months for the block to be placed in a car, so this particular block is "appropriate" for a November or December '69 427, or a 1970 model 454 built in Jan-April of 1970.
Extrapolating production data, there were approximately 1,029 427's per month produced in the '69 model year, and 639 454's per month in 1970. So this is either one of about the last 2,000 427's ever made (pretty rare) or one of the first 2,500 454's.
Given an October 31 '69 cast date, it very well could have been used in a 1969 427 (and probably was). According to prevailing opinion as well as NCRS rules, there is a window of up to 6 months for the block to be placed in a car, so this particular block is "appropriate" for a November or December '69 427, or a 1970 model 454 built in Jan-April of 1970.
Extrapolating production data, there were approximately 1,029 427's per month produced in the '69 model year, and 639 454's per month in 1970. So this is either one of about the last 2,000 427's ever made (pretty rare) or one of the first 2,500 454's.
Intermediate
Joined: Oct 2008
Posts: 30
Likes: 0
Is this a 2 or 4 bolt 512 block? Makes a difference in value. 512 castings were made both ways.
If it is a 4 bolt, look it over any other stampings. Late 69 casting could have also ended up in COPO Camaro or Chevelle - could significantly raise value. Going on memory, might be MN you are looking for.
3963512 427 68-69 Passenger 385,425 HP
3963512 427 69 Chevelle,Camaro COPO (Central Office Production Order)
3963512 427 69 Corvette Late 69
If it is a 4 bolt, look it over any other stampings. Late 69 casting could have also ended up in COPO Camaro or Chevelle - could significantly raise value. Going on memory, might be MN you are looking for.
3963512 427 68-69 Passenger 385,425 HP
3963512 427 69 Chevelle,Camaro COPO (Central Office Production Order)
3963512 427 69 Corvette Late 69
