400 Cubic inch small block, questions - Third Generation F-Body Message Boards

Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!

400 Cubic inch small block, questions

Thread Tools Search this Thread
Old 03-10-2003, 10:26 PM   #1
Thread Starter
Join Date: Aug 2002
Posts: 183

400 Cubic inch small block, questions

I went to the junkyard today to get a strut mount retainer for my 86 z28 cause mine had snapped in half and while I was there I saw a couple blocks and wrote down the casting numbers (a habit of mine at the junk yard), and in a third gen camaro I found a 3951509 casting 400 inch small block with 4 bolt mains (1970 - 72).

I havn't had a chance to go back and mic it yet but the heads are pull and the pistons look pretty beat up so I am sure its been bored over atleast once.

The question is, what is the limit to which you can bore over a 400 small block? And also, what is a good way to get an accurate micrometer reading a on block with rusted cylinder walls?
Acidtalons is offline   Reply With Quote
Old 03-11-2003, 12:25 AM   #2
Senior Member
iTrader: (2)
Aaron91RS's Avatar
Join Date: Jul 1999
Location: St. Louis
Posts: 869
Car: RS
Engine: LS1
Transmission: T56
Axle/Gears: 9" for the ladies

400's have really thin walls especially between the center two cyliders. Like any small block you can go 60 over if you wanted to. however I wouldn't recommend going more then 30 on a 400 because they are thin to start with.
Aaron91RS is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
[VA] Stealth ram compleate 9192camaro Engine/Drivetrain/Suspension Parts for Sale 13 09-20-2017 12:12 PM
Hard starting issue, Chevy 350 small block with Edlebrock Performer Carb theshackle Tech / General Engine 4 03-05-2017 06:37 PM
0411 Run L31 Vortec 350 to EFI Connection 24x Coil Per Cylinder Fast355 DFI and ECM 14 12-02-2016 06:33 PM
cam choice for budget 400 camaro71633 Tech / General Engine 39 09-01-2015 10:24 AM
88 Chevy 305 into my 1991 Pontiac Firebird jhawkeye Engine Swap 4 08-10-2015 04:21 PM

Go Back   Third Generation F-Body Message Boards >

3951509, 400, block, cubic, inch, inchchey, junkyard, small

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Featured Sponsors
Vendor Directory

1982 Camaro '82 || 1983 Camaro '83 || 1984 Camaro '84 || 1985 Camaro '85 || 1986 Camaro '86 || 1987 Camaro '87 || 1988 Camaro '88 || 1989 Camaro '89 || 1990 Camaro '90 || 1991 Camaro '91 || 1992 Camaro '92

All times are GMT -5. The time now is 08:35 AM.

All content copyright 1997 - 2014 ThirdGen.org. All rights reserved. No part of this website may be reproduced without the expressed, documented, and written consent of ThirdGen.org's Administrators.
  • Ask a Question
    Get answers from community experts
Question Title:
Your question will be posted in: