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

Junkyard Advice

Thread Tools
 
Search this Thread
 
Old Dec 16, 2005 | 08:14 AM
  #1  
79vetter's Avatar
79vetter
Thread Starter
Drifting
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Feb 2005
Posts: 1,583
Likes: 5
From: Richardson Tx.
Default Junkyard Advice

I'm looking for a replacement 350 Core and so I called a local junkyard that says that he has one ($100). He is not sure if it is a 350 or a 305. I asked him to tell me the ID#s on the block but he said that I would have to come out and look at that - Fine I will then.
I want to be sure that I am looking at the correct block and that I don't buy a POS. I am looking for a block that has not been overbored yet and that I can make a .020 overbore out of since the pistons I have are this size.
Is there a way that I can easily tell if it has been bored out and if so how much?
How to tell a 305 from a 350? Block ID numbers?
What other things should I be looking out for on a junkyard block?
Reply
Old Dec 16, 2005 | 08:23 AM
  #2  
harrin's Avatar
harrin
Burning Brakes
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Nov 2005
Posts: 840
Likes: 19
From: Oshawa
Default

Originally Posted by 79vetter
I'm looking for a replacement 350 Core and so I called a local junkyard that says that he has one ($100). He is not sure if it is a 350 or a 305. I asked him to tell me the ID#s on the block but he said that I would have to come out and look at that - Fine I will then.
I want to be sure that I am looking at the correct block and that I don't buy a POS. I am looking for a block that has not been overbored yet and that I can make a .020 overbore out of since the pistons I have are this size.
Is there a way that I can easily tell if it has been bored out and if so how much?
How to tell a 305 from a 350? Block ID numbers?
What other things should I be looking out for on a junkyard block?
Try this site, it should give you the info you are looking for.

http://www.mortec.com/bbc.htm
Reply
Old Dec 16, 2005 | 08:47 AM
  #3  
wnmech's Avatar
wnmech
Drifting
10 Year Member
 
Joined: Jun 2005
Posts: 1,523
Likes: 1
From: grand prairie texas
Default

Hey 79vetter I am over here in the GrandPrairie/Arlington area.If you need any help getting that engine in or out I am off Friday's and Saturdays send me a pm and I can come over and give you a hand if needed. I dont know much about Corvettes and you forum people have been super help. I did just rebuild and install the engine in my 77 so I do know how to install the engine. Rick
Reply
Old Dec 16, 2005 | 08:52 AM
  #4  
1982CorvetteDude's Avatar
1982CorvetteDude
Melting Slicks
15 Year Member
 
Joined: Jun 2005
Posts: 2,938
Likes: 2
From: Arkansas
Default

Originally Posted by 79vetter
I'm looking for a replacement 350 Core and so I called a local junkyard that says that he has one ($100). He is not sure if it is a 350 or a 305. I asked him to tell me the ID#s on the block but he said that I would have to come out and look at that - Fine I will then.
I want to be sure that I am looking at the correct block and that I don't buy a POS. I am looking for a block that has not been overbored yet and that I can make a .020 overbore out of since the pistons I have are this size.
Is there a way that I can easily tell if it has been bored out and if so how much?
How to tell a 305 from a 350? Block ID numbers?
What other things should I be looking out for on a junkyard block?
I don't think I would want to deal with a junkyard thats too lazy to leave the desk and walk out to the yard to look at a few numbers on the block. That tells me that they either don't care about making a sale or trying to hide something. For me it's mainly because thier return policies are horrible if somethings not right.

Good Luck with your search
Reply
Old Dec 16, 2005 | 10:40 AM
  #5  
72LS1Vette's Avatar
72LS1Vette
Safety Car
20 Year Member
 
Joined: Aug 2001
Posts: 4,883
Likes: 11
From: North Easton Mass
Default

Have you priced new bare blocks for comparison? By the time you get all of the machine work done on an old block you might exceed the cost of a new block. You will have to spend a certain amount of money just to have the block checked and magnafluxed before you will know if it is even a rebuild candidate. I wouldn't count on getting that money back from the junkyard if the block is cracked or otherwise unusable. The best they would do is give you another one.

Good luck.

Rick B.
Reply
Old Dec 16, 2005 | 12:01 PM
  #6  
marshrat99's Avatar
marshrat99
Melting Slicks
15 Year Member
 
Joined: Aug 2003
Posts: 2,135
Likes: 2
From: Dayton Oh
Default

Originally Posted by 79vetter
I'm looking for a replacement 350 Core...
Is there a way that I can easily tell if it has been bored out and if so how much? What other things should I be looking out for on a junkyard block?
To check to see if the block has been bored, you'll have to take the heads off and measure the bore diameter with a micrometer. An unbored 350 should measure approx. 4.000" in diameter. 20-over would be 4.020", 30-over would be 4.030", etc. Of course, the exact diameter may be a little over due to use. So instead of getting a perfect 4.000", you might see something like 4.005".
Reply

Get notified of new replies

To Junkyard Advice





All times are GMT -4. The time now is 01:41 AM.

story-0
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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-9
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