Western Members CA, AZ, NV, UT, CO, NM, HI

anyone know the casting # for LT1 block

Thread Tools
 
Search this Thread
 
Old May 15, 2010 | 11:41 AM
  #1  
nevrlift13's Avatar
Thread Starter
On The Tree
iTrader: (7)
 
Joined: Oct 2008
Posts: 124
Likes: 0
From: long beach, ca.
Default anyone know the casting # for LT1 block

got a bunch of cores at work and i cant seem to find the casting number for an LT1....anyone know them
Reply
Old May 15, 2010 | 12:45 PM
  #2  
ss.slp.ls1's Avatar
TECH Senior Member
15 Year Member
iTrader: (36)
 
Joined: Jan 2008
Posts: 8,184
Likes: 28
From: Orange County, CA
Default

All LT1 blocks have a big "327" cast into both sides of the block. Dead giveaway.
Reply
Old May 15, 2010 | 01:09 PM
  #3  
nevrlift13's Avatar
Thread Starter
On The Tree
iTrader: (7)
 
Joined: Oct 2008
Posts: 124
Likes: 0
From: long beach, ca.
Default

Originally Posted by ss.slp.ls1
All LT1 blocks have a big "327" cast into both sides of the block. Dead giveaway.
well i just found a block with a big 327 on it i measured the bore and it was 3.75" not 4.00" making it a 305 with the same casting number....now im baffled
Reply
Old May 15, 2010 | 04:36 PM
  #4  
ss.slp.ls1's Avatar
TECH Senior Member
15 Year Member
iTrader: (36)
 
Joined: Jan 2008
Posts: 8,184
Likes: 28
From: Orange County, CA
Default

Originally Posted by nevrlift13
well i just found a block with a big 327 on it i measured the bore and it was 3.75" not 4.00" making it a 305 with the same casting number....now im baffled
Was the 327 on the both sides of the block, like the face where the motor mounts bolt to? If so, I would check the mesuring device or the user.
Reply
Old May 18, 2010 | 02:52 PM
  #5  
nevrlift13's Avatar
Thread Starter
On The Tree
iTrader: (7)
 
Joined: Oct 2008
Posts: 124
Likes: 0
From: long beach, ca.
Default

Originally Posted by ss.slp.ls1
Was the 327 on the both sides of the block, like the face where the motor mounts bolt to? If so, I would check the mesuring device or the user.
do u have any LT1 blocks laying around jason
Reply
Old May 18, 2010 | 03:22 PM
  #6  
ss.slp.ls1's Avatar
TECH Senior Member
15 Year Member
iTrader: (36)
 
Joined: Jan 2008
Posts: 8,184
Likes: 28
From: Orange County, CA
Default

Originally Posted by nevrlift13
do u have any LT1 blocks laying around jason
Not at the moment. Chris has two in his office.
Reply
Old May 18, 2010 | 04:05 PM
  #7  
nevrlift13's Avatar
Thread Starter
On The Tree
iTrader: (7)
 
Joined: Oct 2008
Posts: 124
Likes: 0
From: long beach, ca.
Default

Originally Posted by ss.slp.ls1
Not at the moment. Chris has two in his office.

how much does he want for them
Reply
Old May 18, 2010 | 04:07 PM
  #8  
ss.slp.ls1's Avatar
TECH Senior Member
15 Year Member
iTrader: (36)
 
Joined: Jan 2008
Posts: 8,184
Likes: 28
From: Orange County, CA
Default

Originally Posted by nevrlift13
how much does he want for them
He wants 500 for the shortblock.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-1

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-2

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-3

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-4

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-5

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-6

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-7

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-8

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-9

10 Camaros You Should Never Buy

 




All times are GMT -5. The time now is 11:18 AM.

story-0
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-1
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-2
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-3
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-4
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-5
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-6
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-7
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-8
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-9
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE