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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

351w Heads

  • Thread starter Thread starter graysdad
  • Start date Start date Nov 24, 2009
G

graysdad

New Member
Nov 23, 2009
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Nov 24, 2009
#1
  • Nov 24, 2009
  • #1
I was told that I can use 351w heads on my 302, is that true and if so what would i need to modify or is a DBO (direct bolt on). I think the head bolts are a different size?
 

95Vert383AOD

15 Year Member
Jun 10, 2008
1,133
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69
New Bedford, MA
Nov 24, 2009
#2
  • Nov 24, 2009
  • #2
351 heads have bigger bolt holes 1/2" i believe. You can buy inserts so they fit in the block with smaller bolts.

I believe using 351 heads arent worth it unless you use old old ones. But still im not sure if its worth all the effort.

Chris
 

90lxcoupe

20+ Year Stangneter
Oct 7, 2003
3,596
350
134
Nov 24, 2009
#3
  • Nov 24, 2009
  • #3
you need a washer kit, the washers double as a head bushing, edelbrock sells them, you can also order ARP studs with the option of getting those instead of regular washers.

FYI. All aftermarket heads require the head bushings because they have 1/2" bolt holes versus the 7/16" 302 head bolts
 

95Vert383AOD

15 Year Member
Jun 10, 2008
1,133
34
69
New Bedford, MA
Nov 24, 2009
#4
  • Nov 24, 2009
  • #4
Yeah what 90lxcoupe said
 

KamiKaziDK

Member
May 16, 2005
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0
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Mesa, Az
Nov 24, 2009
#5
  • Nov 24, 2009
  • #5
What 351 heads are you wanting to use?? Cause the only ones that would be a little bit of an upgrade over your e7s would be dooe heads, and if you have to buy them, they really wouldn't be worth the cost
 

SMOKEDYA

20+ Year Stangneter
Jul 13, 2003
3,637
8
79
Tucson AZ
Nov 24, 2009
#6
  • Nov 24, 2009
  • #6
Nah i think up untill 74ish heads are better then e7's.peace









john
 

85_SS_302_Coupe

it sucks (I know) to be on the receiving end
15 Year Member
Nov 11, 2003
6,945
1,598
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Northern KY
Nov 24, 2009
#7
  • Nov 24, 2009
  • #7
Posted via Mobile Device the c9 and d0 heads which are from 69 and 70 are better but the rest are either only as good or worse than stock. Unless you get them super cheap they're not worth using over gt40s.
 

NIKwoaC

中國製造
15 Year Member
Oct 31, 2006
5,525
943
214
Chengdu Province
Nov 24, 2009
#8
  • Nov 24, 2009
  • #8
85_SS_302_Coupe said:
Posted via Mobile Device the c9 and d0 heads which are from 69 and 70 are better but the rest are either only as good or worse than stock. Unless you get them super cheap they're not worth using over gt40s.
Click to expand...

+1, and IIRC 351 heads from the 70s had big combustion chambers which would kill your compression ratio.
 
G

graysdad

New Member
Nov 23, 2009
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0
Nov 24, 2009
#9
  • Nov 24, 2009
  • #9
There not pre-70. Where can I pick up a good set for about $400. Please for give me I am a bowtie convert!
 

KamiKaziDK

Member
May 16, 2005
555
0
17
Mesa, Az
Nov 25, 2009
#10
  • Nov 25, 2009
  • #10
For $400 try to find some gt40 or gt40p heads, they can usually be found for around $250 if you look around enough
 

90lxcoupe

20+ Year Stangneter
Oct 7, 2003
3,596
350
134
Nov 25, 2009
#11
  • Nov 25, 2009
  • #11
Look for a set of used GT40x aluminum heads, great for the money
 

85_SS_302_Coupe

it sucks (I know) to be on the receiving end
15 Year Member
Nov 11, 2003
6,945
1,598
223
Northern KY
Nov 26, 2009
#12
  • Nov 26, 2009
  • #12
Posted via Mobile Device the comment about the bowls is also true. They vary as the years go but i think most are around 60cc bowls. It's easy to fix if you can have them milled down to 58 or whatever you'd like. Another thing to keep in mind is that if you're swapping them onto a late model 302 you'll need to buy stud mount rockers since the later heads used pedestal mount style. For the cash you're looking to spend you can find gt40 heads and maybe even used roller rockers.
 
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