351 heads

5

5.0_sleeper

New Member

Jun 6, 2006

47

0

0

Jul 24, 2006

#1

• Jul 24, 2006

• #1

Hey, got another question for you guys. I was wondering if 351 heads would fit on 302 and be able to use the stock 302 intake manifold? Also was wanting to know if the 351 heads would be big enough for fms f cam, as far as piston to valve clearance or not? Or if I go with 351 heads will I have to get 351 intake manifold to fit.

thanks
5.0_sleeper

 

E

emagdnim

Active Member

Feb 5, 2003

391

15

28

Jul 24, 2006

#2

• Jul 24, 2006

• #2

They will work with the 302 intake. Ford engineers say you will can gain 30hp if you use the right 351 heads and maintain a good compression ratio.

 

M

mercurycapri

Member

May 30, 2006

211

2

18

washington

Jul 24, 2006

#3

• Jul 24, 2006

• #3

It will fit you do need after market head bolts. 351 use bigger head bolts. ARP sells bolts that will work. The only differance between the 302 and 351 is the bolt size. Everything else will bolt up.

 

eagleautosports

New Member

Jul 7, 2006

139

0

0

Mebane NC

Jul 25, 2006

#4

• Jul 25, 2006

• #4

Both Edelbrock and TFS has head bolt bushings for this because the 351 head bolt holes are 1/2 inch and 302's are 7/16. But everything else should work.

 

8

86bluecobra

Advanced Member

Dec 20, 2004

4,265

12

69

B.C. Canada

Jul 25, 2006

#5

• Jul 25, 2006

• #5

get a set of 69 heads if you want the good stock 351w heads.

 

R

R2D2

Jul 25, 2006

#6

• Jul 25, 2006

• #6

use a 69-70 head, the rest are junk. Remember the 351 was nothing more than a dump truck motor.

 

Dark Knight

Founding Member

Feb 1, 2000

2,578

0

0

Chandler, Az.

Jul 25, 2006

#7

• Jul 25, 2006

• #7

Late model 302 and 351 heads are the same.. only ones worth the swap are 70's...the later ones have bigger chambers, you'll loose more HP with the loss of compression then you will gain from the bigger ports. If they need going through.. valve job, springs etc.. it usually isnt worth it, aftermarket iron heads would be cheaper.