V6 to V8 Motor swap issues with mount bracket - 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 09-13-2010, 01:44 PM
Registered User
 
Join Date: Mar 2010
Location: PA
Posts: 51
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
V6 to V8 Motor swap issues with mount bracket

I am pulling a 4.3 V6 from a 1987 Chevy R10 Pick up. I am replacing it with a 383 stroker.

I know the V6 mount brackets are different than the V8, so i went to a local junkyard and pulled the two clam shells and two brackets(frame to cross member) off a 1986 truck. I did not think to see the size or model but it had a utilty box on the back so I figure at least a 3/4 ton.

Came home and the brackets will not line up with the cross member or frame holes. I thought the frames of the 80's trucks are the same.

What am I missing. How can I fix this?

I am assuming there is a difference either in the cross member of a 2 wheel drive VS a 4 wheel drive or this truck has a strange frame. Any help is apprecitated.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 09-13-2010, 03:21 PM
Registered User
 
Join Date: Mar 2010
Location: PA
Posts: 51
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I looked at the frame and it seems that the lower part of the C is about 2" and the upper is aroun1 1/2" seems the C is not even. When the bolts are placed in the bottom of the bracket and tightened down it is about half inch off which is the amount of the frame difference. This is a factory frame and not hacked up. Anyone seen this before?

Last edited by remist17; 09-13-2010 at 03:38 PM.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 09-15-2010, 01:18 PM
Registered User
 
Join Date: Mar 2010
Location: PA
Posts: 51
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Wow no one is willing to help me out !!

Well I looked at the frame and mount brackets again... I had them in correctly and still about 1/2" from the holes. So I took some dimensions, 1 3/8 top flange of frame and 2 1/2" flange bottom of frame. Centerline of mount to centerline of mount 17 1/2".
Went to the junk yard and sat in front of some square bodies and looked at the mounts. Ifound a 86 C10 Top of frame is 1 1/4" bottom of frame is 2 1/4 and 16" center line.
I found a 87 burb 2 wheel drive... It had the same dimensions as mine. So to answer some not all squares are the same.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 09-15-2010, 02:58 PM
Daily Grinder
 
Last photo:
Join Date: Sep 2010
Location: Roanoke, VA
Age: 39
Posts: 123
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
You will need the frame mounts from an S10 with the 2.8 V6. Sorry, don't have any pics of that yet because my 2.8 is still in the truck. This is what I have followed from a bunch of V8 S10 swap forums. Then order the motor mount brackets from the net. Here is the whole kit, and it allows adjustability of your motor too from moving it forwards or back if needed.

4.3 V8 Swap Mount Kit
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 09-15-2010, 05:42 PM
Registered User
 
Last photo:
Join Date: Jan 2007
Location: canada
Posts: 565
Wiki Edits: 0

Thanks: 0
Thanked 3 Times in 3 Posts
s10 mounts won't help for a half ton truck
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 09-15-2010, 05:43 PM
Daily Grinder
 
Last photo:
Join Date: Sep 2010
Location: Roanoke, VA
Age: 39
Posts: 123
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Sorry...thought that was a typo...R10...S10...
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 09-15-2010, 05:44 PM
Registered User
 
Last photo:
Join Date: Jan 2007
Location: canada
Posts: 565
Wiki Edits: 0

Thanks: 0
Thanked 3 Times in 3 Posts
c10 name was changed to r10 for 87 only then changed again to c1500
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 09-15-2010, 08:53 PM
bigdog7373's Avatar
Of course it's fast
 
Last photo:
Join Date: May 2010
Location: florida
Posts: 2,670
Wiki Edits: 0

Thanks: 13
Thanked 49 Times in 49 Posts
what engine was in the truck you took the mounts from. If it happened to be a 307 it has different mounts than a regular sbc.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 09-16-2010, 09:34 AM
Registered User
 
Join Date: Mar 2010
Location: PA
Posts: 51
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by bigdog7373
what engine was in the truck you took the mounts from. If it happened to be a 307 it has different mounts than a regular sbc.
I am not sure. Motor was already pulled at the junk yard and I did not think to check the spec sheet. I would assume a big burb would have a 350 in it.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 09-16-2010, 05:56 PM
Registered User
 
Last photo:
Join Date: Jan 2007
Location: canada
Posts: 565
Wiki Edits: 0

Thanks: 0
Thanked 3 Times in 3 Posts
307s wern't offered in the 80s
305 and 350s would have used the same mounts from factory. there might be differences in the brackets between and 3/4 ton
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 09-22-2010, 11:12 AM
Registered User
 
Join Date: Mar 2010
Location: PA
Posts: 51
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by va4cqd
307s wern't offered in the 80s
305 and 350s would have used the same mounts from factory. there might be differences in the brackets between and 3/4 ton
I know neither truck was a 3/4 ton. The truck had different mounts than the burb. Just a FYI not all the 80's trucks 1/2 ton have the same mounts. Trust me I found out the hard way!
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:
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
V6 Motor Mount Swap to V8??? SSWisher Engine 9 02-15-2005 08:14 PM
63 v6 to v8 deadmanstaxi Engine 1 10-31-2004 09:34 PM
Fan hit upper rad. hose!! mustangdude947 Engine 14 08-19-2004 04:52 PM
low mount alt. bracket for BBC short water pump uneedmorethen10s General Rodding Tech 3 01-26-2004 05:41 PM
v6 to v8 swap 842door Engine 7 01-08-2003 05:42 PM


All times are GMT -6. The time now is 03:49 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.