Ford 302 SS build

[Jim Caughlin]

Originally Posted by fordteacherguy

The 68 302 iron head HP dropped to 207 hp and could be a great combo. 23 HP less than aluminum!

Which carb comes on that combo?

[Doug Hoven]

Originally Posted by Jim Caughlin

Which carb comes on that combo?

Depends on whether you call it a Ford or a Mercury 302. If run as a ford, it gets the 450cfm version of the motorcraft 4300 spread bore, air valve secondary carb. If called a Mercury, you are allowed to run a 600cfm 4150 holley.

[ShipC1970]

Originally Posted by Doug Hoven

Depends on whether you call it a Ford or a Mercury 302. If run as a ford, it gets the 450cfm version of the motorcraft 4300 spread bore, air valve secondary carb. If called a Mercury, you are allowed to run a 600cfm 4150 holley.

Why is that and how is that? So I have the original 70 block and matching heads. So hypothetically even though it’s from a ford mustang and I run it in my mustang in GT/QA or PA and say it’s a “mercury” engine I could run a 4150? Who checks this by the way? Forgive me for all the questions I’m new!

[Chris1529]

I had a 95 F150 with the 351W that I used to tow with. I think it was only rated at 210 HP then with EFI and was a non roller cam as well. It had 325# torque, but at 2800 rpm. It was a really good engine in that truck as far as pulling with a 1/2 ton 4x4. The Lightning trucks of the day had the GT40 heads I think, but I never drove one for comparison.
I also have the parts for a 69 290HP 351W, but feel its too high a factor to start out with in S/SS unless you really want to do it.

[BRETV]

Originally Posted by Chris1529

I had a 95 F150 with the 351W that I used to tow with. I think it was only rated at 210 HP then with EFI and was a non roller cam as well. It had 325# torque, but at 2800 rpm. It was a really good engine in that truck as far as pulling with a 1/2 ton 4x4. The Lightning trucks of the day had the GT40 heads I think, but I never drove one for comparison.
I also have the parts for a 69 290HP 351W, but feel its too high a factor to start out with in S/SS unless you really want to do it.

The Lightnings those years had the same motor as the Cobra R except the trucks had the tublar GT40 intake and the Cobra had the cast intake. Yes same F3 GT40 heads.


Bret Velde
2003 I/SA

[Rick J]

Just looked up the max intake port volume allowed for the 68 302/230, what I saw was 130cc, is that right?

Looked up the 64 289/210 and saw 155cc?

What did I miss?

Thanks

[goinbroke2]

PM sent

[1347]

Originally Posted by JA.CK

Just looked up the max intake port volume allowed for the 68 302/230, what I saw was 130cc, is that right?

Looked up the 64 289/210 and saw 155cc?

What did I miss?

Thanks

Nothing, that's what it is. Many years ago, people submitted heads to be poured and that's what they came up with. My cast Iron heads are ported to the 130/49cc spec.

[Rick J]

Originally Posted by 1347

Nothing, that's what it is. Many years ago, people submitted heads to be poured and that's what they came up with. My cast Iron heads are ported to the 130/49cc spec.

Wow, nice work getting yours to run like it does 👍