351 shorty headers

blackcloud50 · May 27, 2006

Anyone using shorty headers on a 351?

vristang · May 27, 2006

I am.

Is that your only question?

jason

EDIT: You do mean a Windsor, right?

blackcloud50 · May 28, 2006

vristang said:
I am.

Is that your only question?

jason

EDIT: You do mean a Windsor, right?

Yes I did mean for Windsor. What headers are they and does the standard H-pipe work with no problems? Also is the location of the motor still stock?

vristang · May 29, 2006

The 351w sits in the same location as the stock 302. The same motor mounts and trans/bellhousing are used.

The industry standard is for the swap headers to bolt up to a factory 302 mid pipe. I have not seen any headers that did not follow this standard.

I am using mac unequal shorties. I have no complaints, but others have declared that they do not fit as well as the more expensive brands.

I have a pretty detailed article on my website on the 351w fox body swap. There is a link to the site in my sig.

Let me know if you have more questions.
Are you planning the swap now?

jason

86bluecobra · May 29, 2006

I also use shortie headers on my 351w. bbk swap shorties. They work great. bolt right up to a factory h-pipe.

blackcloud50 · May 29, 2006

vristang said:
The 351w sits in the same location as the stock 302. The same motor mounts and trans/bellhousing are used.

The industry standard is for the swap headers to bolt up to a factory 302 mid pipe. I have not seen any headers that did not follow this standard.

I am using mac unequal shorties. I have no complaints, but others have declared that they do not fit as well as the more expensive brands.

I have a pretty detailed article on my website on the 351w fox body swap. There is a link to the site in my sig.

Let me know if you have more questions.
Are you planning the swap now?

jason

I'm aware that the 351 sits in the same location as 302. I was just wondering in your particular application did you use an aftermarket K-member that maybe lowered the motor or set it back to get the headers to connect to factory 302 midpipe.

So do the headers have to be labeled "swap headers" to be able to use factory midpipe or will any 302 shorty header work just fine? I was looking into getting a 1 3/4" shorty possible from AFM but not sure if I can use them because they do not mention they are for 351 swap. Also do you know of any other manufacturer that makes 1 3/4" shortys?

86bluecobra · May 29, 2006

i believe vristang is using 351w swap headers. you can't use 302 headers and expect that the headers and the h-pipe will mate properly. there are 1 3/4 shortie 351w shorties out there.

blackcloud50 · May 29, 2006

86bluecobra said:
there are 1 3/4 shortie 351w shorties out there.

By who?

86bluecobra · May 29, 2006

looks like i may be wrong. I searched everywhere all i see is 1 5/8 shorty swap headers.

STANGateURlilSS · May 29, 2006

www.andersonfordmotorsport.com

they list a 1.75" or 1 3/4" shorty header for 351w

86bluecobra · May 29, 2006

couldn't find it in there catalog could you list page?

STANGateURlilSS · May 29, 2006

www.andersonfordmotorsport.com/catalog/page55.htm

there made by bassani for afm

86bluecobra · May 29, 2006

i see kinda wierd that the 302 and the 351w are the same part number. I would call them before ordering those because something seems fishy there. 351w swap headers are longer then the 302 shorties.

vristang · May 30, 2006

blackcloud50 said:
I'm aware that the 351 sits in the same location as 302. I was just wondering in your particular application did you use an aftermarket K-member that maybe lowered the motor or set it back to get the headers to connect to factory 302 midpipe.

So do the headers have to be labeled "swap headers" to be able to use factory midpipe or will any 302 shorty header work just fine? I was looking into getting a 1 3/4" shorty possible from AFM but not sure if I can use them because they do not mention they are for 351 swap. Also do you know of any other manufacturer that makes 1 3/4" shortys?

I agree with 86bluecobra - Call them before ordering. If headers are not listed as 351w swap headers then they are most likely for a 302 application.

There are 2 factors that make 351w swap headers necessary. First is the increased height of the 351w block and second is the increased width of the 351w block.
Due to the 351w block being taller, the swap headers must be taller if they are to bolt up to the stock midpipe. Also, since the 351w is wider, the swap headers must hug the block tighter in order to bolt up to the stock midpipe.

If the part is not listed as a 351w swap header, then assume it is built for a 302.
Expect the swap headers to be slightly more expensive than the 302 headers.

jason

blackcloud50 · May 30, 2006

86bluecobra said:
looks like i may be wrong. I searched everywhere all i see is 1 5/8 shorty swap headers.

I haven't seen any 1 3/4" swap shorty headers either.

blackcloud50 · May 31, 2006

I wonder if I can use 1 5/8" shorty headers with a Edelbrock Victor Jr. heads

87Mustang351 · May 31, 2006

im using bbk shorttys on my 351 W with stock heads and the drivers side is a SOB to bolt on and line up i really dislike them lol but what can i do

vristang · May 31, 2006

86bluecobra said:
i believe vristang is using 351w swap headers.

You know me well my neighbor to the north

We have not mentioned equal vs unequal.

Mine are unequal.

Are there equal length available for the 351w Fox body?

All headers are going to be tough to install. The larger pipes take up more room, and since we all want them mandrel bent for increased flow, the bends are restricted when it comes to the radius of the bends.
Just my opinion

jason

blackcloud50 · May 31, 2006

vristang, what heads are you using?

vristang · May 31, 2006

blackcloud50 said:
vristang, what heads are you using?

TrickFlow Twisted Wedge.

The heads you have shouldn't matter, as long as they accept the stock 302 exhaust manifold bolt pattern.
This is about 98% of the heads out there.

jason

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