Ford 351W Heads on 302? - 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> Hotrodding Basics
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 05-11-2008, 01:33 PM
66Moostang's Avatar
Registered User
 
Join Date: May 2008
Location: Las Vegas
Posts: 33
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Ford 351W Heads on 302?

Will 351W Heads fit on a 302? It might depend on the year but im not sure.. the heads i think are 70's but not sure about the block. Any information would be most helpful
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 05-11-2008, 02:15 PM
Member
 
Last photo:
Join Date: Dec 2003
Location: texas
Age: 69
Posts: 527
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I used 1 '69 and 1 '70 351W head on a '77 302 block back in about '82.
the only difference, I believe, is that the 351 uses 1/2" bolts, where the 302 uses 7/16" bolt.
The only issue is that the head bolts will not fit the holes snugley, but the alignment rings will hold the heads in the proper location.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 05-11-2008, 02:24 PM
Registered User
 
Join Date: May 2008
Location: Oklahoma
Posts: 6
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
they will fit--u will need to use the 351w intake with them
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 05-11-2008, 03:34 PM
Member
 
Last photo:
Join Date: Dec 2003
Location: texas
Age: 69
Posts: 527
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
"u will need to use the 351w intake with them"
*
That is not correct.
The heads are the same overall size. I used a 302 intake with 351W heads on a 302.
JA
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 05-11-2008, 04:07 PM
firedome
 
Join Date: Apr 2008
Location: Lemont, IL
Age: 59
Posts: 5
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
351W heads on a 302W

The 351 heads have larger ports AND a larger combustion chamber, so compression will drop somewhat. Compensation for this can be done in two ways: higher deck height pistons or milling (surfacing) the heads. The piston change is the most desirable as you would not be changing the intake bolt alignment by lowering the head position on the block. This is especially critical on the small block Ford as the intake bolts are vertical.
Also the 351W intake manifold gasket must be installed to prevent coolant leaks due to the differences in the coolant outlet(s) at the ends of the intake side of the head. The 302W has a small, rectangular-shaped coolant port, where as the 351W has an "L" shaped port.
Make sure you place the head gasket on the block the correct way or else the engine will over heat in about 5 minutes.
Good luck!
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 05-11-2008, 07:34 PM
66Moostang's Avatar
Registered User
 
Join Date: May 2008
Location: Las Vegas
Posts: 33
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Will the year matter? for example, will '69 heads fit a '90 block?
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 05-11-2008, 08:27 PM
RippinRon's Avatar
Member
 
Last photo:
Join Date: Jun 2004
Location: Thornbury, Ontario
Age: 33
Posts: 948
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Quote:
Originally Posted by johnnya
"u will need to use the 351w intake with them"
*
That is not correct.
The heads are the same overall size. I used a 302 intake with 351W heads on a 302.
JA
You must have used spacers then. The 351w has a greater deck height which makes the heads further apart which in turn needs a wider intake. You can read it here
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 05-11-2008, 08:48 PM
Member
 
Last photo:
Join Date: Dec 2003
Location: texas
Age: 69
Posts: 527
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
You're correct. The BLOCK has a taller deck height, requiring the wider manifold. The heads are the same.
I used 351W heads on a 302 block with a 302 intake and no special spacers or other magic.
PS: from your source:
"However, both series of engines use the same bore spacing and the bolt patterns are the same, so 289/302/351 heads will interchange."

Last edited by johnnya; 05-11-2008 at 08:55 PM.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 05-11-2008, 09:52 PM
1969NovaSS's Avatar
turbo lag......yeeeeehaaaaaaw
 
Last photo:
Join Date: Feb 2005
Location: oxnard,ca
Age: 27
Posts: 678
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
If you can find early 351w heads they have the smaller chamber in them. Or you can find some gt40 heads on an explorer. They are a modern design of the early 351w heads.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 05-12-2008, 08:20 AM
Member
 
Last photo:
Join Date: Jul 2005
Location: Mt. Washington,Ky.
Posts: 351
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by johnnya
You're correct. The BLOCK has a taller deck height, requiring the wider manifold. The heads are the same.
I used 351W heads on a 302 block with a 302 intake and no special spacers or other magic.
PS: from your source:
"However, both series of engines use the same bore spacing and the bolt patterns are the same, so 289/302/351 heads will interchange."
This is correct. The only difference is that 351W heads have bigger bolt holes where it bolts to the block.

All 351W heads are not equal. I'm not sure which year but the later 351s had the same size valves and ports as the 302s.

Danny
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 05-12-2008, 08:40 AM
Irelands child's Avatar
Registered User
 
Last wiki edit: Ford engine specifications Last photo:
Join Date: Jan 2005
Location: Upstate New York
Posts: 4,730
Wiki Edits: 8

Thanks: 12
Thanked 151 Times in 135 Posts
Frank Valentino got it right !!!

Dimensionally, the 289, 302 and 302/5.0 are identical.

There are several sources for the required bolt bushings - this is Summit's:http://store.summitracing.com/egnsea...=KeywordSearch

This is Summit with a TFS head - and what they fit: http://store.summitracing.com/partde...700+4294867081

You need the right gaskets: head, intake and exhaust.

You will lose compression - but in today's world, might not be a bad thing. If you mill the head for compression, the intake will need it as well.

Look for stock Ford heads D0OE-C or G, or C9OE-B or D. They have the biggest valves though some have a hump in the exhaust port that should come out with a grinder. Don't worry about plugging the hole that is in the hump.

Dave W
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 02-14-2012, 10:40 AM
Registered User
 
Join Date: Feb 2012
Posts: 19
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
irelands child, you said something about dont worry about plugging the hole in the hump. does this go for the gt-40p heads also. ????
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 02-14-2012, 11:35 AM
Irelands child's Avatar
Registered User
 
Last wiki edit: Ford engine specifications Last photo:
Join Date: Jan 2005
Location: Upstate New York
Posts: 4,730
Wiki Edits: 8

Thanks: 12
Thanked 151 Times in 135 Posts
Quote:
Originally Posted by mmason1
irelands child, you said something about dont worry about plugging the hole in the hump. does this go for the gt-40p heads also. ????
What hole/hump in the GT40P heads exhaust? Mine don't have either nor have any I've seen. That hole is part of the EGR system/air pump for carbed engines.Later 302/5.0 engines don't have that.
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 02-14-2012, 04:40 PM
Member
 
Last photo:
Join Date: Aug 2003
Location: surrey bc canada
Age: 73
Posts: 632
Wiki Edits: 0

Thanks: 0
Thanked 9 Times in 9 Posts
351 heads

Quote:
Originally Posted by Irelands child
What hole/hump in the GT40P heads exhaust? Mine don't have either nor have any I've seen. That hole is part of the EGR system/air pump for carbed engines.Later 302/5.0 engines don't have that.
the early 351w heads have larger int and ex valves,you may run into piston to valve isue as 302 with flat top pistons,they have smaller reliefs,after 1971they went to small 302 valv size.re the head bolt get hardened flat washers for the302 bolts,or summit has the corect 1s,if not you will crack the heads or the bolts will migrate into the 1/2 in holesand you will blow head gasket,like preveous posts the manifolds will fit fine,but use the corect intake gaskets or water will leak.
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 02-17-2012, 07:49 AM
Registered User
 
Join Date: Feb 2012
Posts: 19
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
So I'm looking to put a set of 351w heads on my 302. I had planned to have them shaved what kind of clearance issues would I have with those heads and 302 piston?
Reply With Quote Quick reply to this message

Recent Hotrodding Basics 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


Similar Threads
Thread Thread Starter Forum Replies Last Post
ford 302 heads cope Engine 0 05-02-2008 03:51 PM
Building A 302 Chevy Scorpio Shaping Flow Hotrodding Basics 6 01-16-2007 05:55 AM
Why is the Ford 302 block better than the 351W? BarbWire Engine 63 06-01-2006 05:35 PM
Heads for Ford 302 Coleman396 Engine 12 03-31-2004 08:51 PM
1978 ford 302 heads CREVISTON Engine 9 09-12-2003 11:56 PM


All times are GMT -6. The time now is 09:41 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.