Big Block Installation - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 11-01-2004, 05:32 PM
Registered User
 
Join Date: Oct 2004
Location: Illinois
Posts: 11
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Big Block Installation

I am wanting to install a big block in a 71 chevy pickup that currently has a small block. Will I have to do any frame modifications or other under the hood mods to the truck to get it to fit in correctly?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 11-01-2004, 05:37 PM
Jmark's Avatar
Registered User
 
Last photo:
Join Date: Sep 2003
Location: phoenix
Age: 61
Posts: 4,815
Wiki Edits: 0

Thanks: 0
Thanked 3 Times in 3 Posts
Nope, should drop right in. Any chevy auto or manual bellhousing will bolt up too. Hardest part will be finding all the necessary accessory engine brackets.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 11-01-2004, 05:41 PM
Registered User
 
Join Date: Oct 2004
Location: Illinois
Posts: 11
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Will I only need the motor mounts from the original application of the big block, and will I have to modify them to bolt to my frame?
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 11-01-2004, 06:18 PM
TooSlow's Avatar
Beater Driver
 
Last photo:
Join Date: Jun 2004
Location: Davenport, Iowa
Posts: 50
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Your small block motor mounts will accept the big block no problem. If you plan to run headers be sure to check with the manufacturer to see if they made them with big block or small block motor mounts in mind as the installed height of the engine may be a little different and this can cause some clearance problems.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 11-01-2004, 06:39 PM
Registered User
 
Join Date: Oct 2004
Location: Illinois
Posts: 11
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
How much weight will the big block add to the vehicle opposed to the small block?
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 11-01-2004, 11:20 PM
benwantland's Avatar
Member
 
Last photo:
Join Date: Oct 2004
Location: Iowa
Posts: 199
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
I dunno, but for a project like this, you're going to have a lot of questions, and you might want to check out www.67-72chevytrucks.com
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 11-02-2004, 10:20 AM
gpeak's Avatar
Member
 
Last photo:
Join Date: Oct 2003
Location: Kansas
Age: 42
Posts: 384
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally posted by Mowdigger
How much weight will the big block add to the vehicle opposed to the small block?
Maybe 200 pounds?
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 11-02-2004, 11:33 AM
Siggy_Freud's Avatar
Hotrodders.com Moderator
 
Last photo:
Join Date: Dec 2003
Location: Portland, Oregon
Age: 29
Posts: 2,371
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Wont add a whole lot of weight. If your worried about suspension handling it dont be lol. You might notice it a bit in the corners but not many people build trucks with cornering in mind anyways lol.
__________________
Bringing history and technology together.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 11-02-2004, 12:46 PM
Registered User
 
Join Date: Oct 2004
Location: Illinois
Posts: 11
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Will it make a difference if the big block engine comes out of a two ton truck? As far as bell housings bolting up and firewall clearance.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 11-02-2004, 01:07 PM
Siggy_Freud's Avatar
Hotrodders.com Moderator
 
Last photo:
Join Date: Dec 2003
Location: Portland, Oregon
Age: 29
Posts: 2,371
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
As far as I've always known, a chevy bb is a chevy bb is a chevy bb.

It would be a lot cheaper for them to modify the sheet metal in the car to fit the engine than to redesign an engine for a different car.

It should fit fine and bolt right up to any GM transmission.
__________________
Bringing history and technology together.
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 11-02-2004, 01:12 PM
poncho62's Avatar
Out of the Loop Moderator
 
Last wiki edit: Streetbeasts links
Last journal entry: at car show
Last photo:
Join Date: Oct 2003
Location: Hanover, Ontario, Canada
Age: 62
Posts: 16,893
Wiki Edits: 5

Thanks: 20
Thanked 258 Times in 211 Posts
Large Chevy gas truck motors (not sure about the 2 ton) were tall blocks, 366 and 427. They bolt up the same, but have smaller heads and are not made to rev as high. They do however have 4 bolt mains and steel cranks.
__________________
Ontario Rodders

Budget RVs
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On



All times are GMT -6. The time now is 03:10 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.