396 Motor - 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 02-19-2003, 03:54 PM
New Member
 
Join Date: Feb 2003
Location: Clifton, New Jersey
Age: 58
Posts: 29
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post 396 Motor

I was just reading another post about some good flowing heads from 70 to 73 on a Big Block chevy. I dont know my casting #'s but I will find out. But the post said these were excellent flowing and can out perform some aftermarket heads. Since I heard this before, I decided to keep my stock heads on my 72 396. But what I didnt know was that the post said that these years came with a steel crank. Is this true?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 02-19-2003, 05:55 PM
BOBCRMAN@aol.com's Avatar
Member
 
Last photo:
Join Date: May 2002
Location: Holly, michigan
Posts: 8,130
Wiki Edits: 0

Thanks: 25
Thanked 267 Times in 250 Posts
Post

low hp. 402 BB 70-73 were cast iron crank motors.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 02-19-2003, 07:03 PM
abe abe is offline
Member
 
Join Date: Dec 2002
Location: hawaii
Posts: 132
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

Most big blocks had steel cranks up to 1971. after that all big blocks and small blocks horse power levels went down to unleaded fuel and the EPA required major changes in the automotive engines. But the best oval port factory heads are from 1971 -1974 which are semi open chamber with 113 CCV. the casting #'s are 336781, 353049, 3999241 ( got these on my big block ) and 3993820. these heads are great up to 6500 rpm. And they are outstanding street screamers with a high lift with a short duration cam and a stout holley.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 02-20-2003, 04:16 PM
New Member
 
Join Date: Feb 2003
Location: Clifton, New Jersey
Age: 58
Posts: 29
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

Hey Abe is there a chance my 72 BB Camaro came from that shortened strike year with a left over steel crank? Any way to tell? Dont say pull the pan. Just putting this thing together after 2 1/2 years, I want to start the damn thing already!
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 02-20-2003, 06:37 PM
abe abe is offline
Member
 
Join Date: Dec 2002
Location: hawaii
Posts: 132
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

More then likely your engine has a cast crank. Best way to tell is to climb under the engine and remove the cover for the torque converter that covers the flex plate. If its an automatic. you will need a flash light to look at the crank flange where the flex plate bolts up to it. the flange will have a parting line about 1/8" for a cast crank and a steel crank will have about an 1/2" parting line. Now if u have an manual trans u may need an inspection mirror for u to see with the flash light and if u dont see the parting line u may need to turn the engine over slowly until u can see it.
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 01:44 PM.


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.