I'm currently in the proccess of building a 390 to be placed in a 67 Mustang coupe. I have a friend in the parts business and has many 390 heads for me to go through and see what kind of #'s i can find. I'm planning to use FPA tri-Y's headers. I can't afford edelbrock heads yet but plan on picking up a pair when i finish college ( thinking the EDL-6007 heads). My question is what head #'s would have the same bolt pattern as the EDL-6007 heads as well as decent performance ( I don't want to have buy headers a second time)? From the picture of the edl-6007 heads it looks like (blury pict) it just has the vertical holes around the exhaust ports?? Wonder if the additional bolt holes would be better as far as sealing the headers is concerned. I am new to fe heads so please be gentle :-)

Thanks,
David

 

[font size="1" color="#FF0000"]LAST EDITED ON 10-Jun-01 AT 03:17 PM (EST)[/font][p]David, here's the deal. For a Mustang, you need the diagonal bolt pattern heads. Ford had two versions, 14-bolt and 16-bolt. The 14-bolt heads have low-exit exhaust ports, the 16-bolt have high-exit ports. You have to match the right exhaust manifolds to the number of bolts or headers to the port height. The Edelbrock heads you want are the 6006 for the Cobra Jet, they have the 16-bolt pattern. When you order headers from FPA, tell them you have these heads, they are high-exit. As far as an iron head, you would have to run 16-bolt heads to be compatible with the FPA high-exit headers.

Barry

Thinking about it a little more, you could use 14-bolt heads with the FPA high-exit headers. I think their flange is slotted on the ends to accept both, verify this with them. You would still have a port mis-match but the low-exit heads are low performers anyway.

 

. The 14-bolt
>heads have low-exit exhaust ports,
>the 16-bolt have high-exit ports.

What are you talking about, high port heads?? You are way off. The exhaust ports on FE heads are all about the same. Only ones to have a different exhaust port are some of the 427 engines. They have a slightly different size exhaust port. The intake ports are why these 427 heads are referred to as low riser, medium riser, high riser. The exhaust ports on FE engine are located in the same spot, and except for the aforementioned 427 heads, are all the same size; including the CJ heads. Yes there are different amount of bolts holes, but not because of a different location.





>[font size="1" color="#FF0000"]LAST EDITED ON 10-Jun-01
>AT 03:17 PM (EST)[/font]
>
>David, here's the deal. For
>a Mustang, you need the
>diagonal bolt pattern heads.
>Ford had two versions, 14-bolt
>and 16-bolt. The 14-bolt
>heads have low-exit exhaust ports,
>the 16-bolt have high-exit ports.
> You have to match
>the right exhaust manifolds to
>the number of bolts or
>headers to the port height.
> The Edelbrock heads you
>want are the 6006 for
>the Cobra Jet, they have
>the 16-bolt pattern. When
>you order headers from FPA,
>tell them you have these
>heads, they are high-exit.
>As far as an iron
>head, you would have to
>run 16-bolt heads to be
>compatible with the FPA high-exit
>headers.
>
>Barry
>
>Thinking about it a little more,
>you could use 14-bolt heads
>with the FPA high-exit headers.
>I think their flange is
>slotted on the ends to
>accept both, verify this with
>them. You would still
>have a port mis-match but
>the low-exit heads are low
>performers anyway.

 

PetesPonies, around 1967 when ford went to the smaller intake port size most common to the C8AE-H they also lowered the exit for the exhaust port I've been told this is primarily through a lip on the roof of the port. all I have in my heads is the later style with the lowered roof

 

Ok TP, with a little work they can be made to go.

Pete, get a 14-bolt and 16-bolt head side-by-side and compare some measurements on the exhaust flanges.

Man, this board is tough!

Barry

 

lol, I thought I was agreeing with you

 

Sorry TP, didn’t see ya till I posted. Should refresh the screen more often. 154 mph in a ’31 Model A sedan, very impressive!

I was kinda assuming that David wasn’t going to throw a lot of time and money into the iron heads since he’s springing for the edelbrocks later.

Barry

 

Can any of the FE heads (diagonal bolt pattern heads or the 14 bolt pattern heads) have all 16 holes drilled so that i could go ahead and get the CJ fpa tri-y's? I know the answer may be obvious to you guys but I'm still learning my way round these FE's. Thanks for the info guys and thank you Barry for the link about the fpa tri-y's and the correct part # for the edlebrock heads.

Thanks,
David

 

I think that's what was attempted in the first photo of 390GT heads that had 18 bolt holes they took 16 bolt holes and added two lowered ones on the end I'm guessing

 

David, as long as the heads have the extra bosses for the bolt holes you can drill and tap. On the blind holes, don’t drill any deeper than the originals or else you’ll hit water.

Barry

 

I have a 67 mustang factory 390 car. I got this car with no motor & I got a really nicely built 390 out of my buddies totaled 61 galaxy is it difficult or impossible to put this motor in with the 8 bolt heads? Do I need 2 find 14 bolt heads & will they bolt up to this motor?

 

Actually it was 1966 as the 390GT had the small port heads.

 

You are going to have motor mount issues as the early 60s engine motor mounts bolted on with 2 bolts, while the 1966 and later engines used 3 bolt motor mounts. If you can find some after market headers it will work, but the cast iron manifolds are a no go. The intake will also have large ports so the slant bolt 390 heads will be a major mismatch. You will need to use 428CJ heads for a proper port match.

 

I have a set of hooker super comp headers can i use the stock intake and will the factory mustang motor mounts work?