Cylinder head ID
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Mountain Pass
Joined: Jun 2018
Posts: 218
Likes: 34
Cylinder head ID
I've been looking through old threads in reference to headers. Hooker comp headers were mentioned a couple of time as fitting well. I looked on the Hooker sight at these and they specifically state " will not fit passenger car heads".
Number Dummy decoded the tag from my engine at one time and said it was a 390 from a 68' Mercury passenger car. The heads are marked C8AE-H.
After researching further I can't find out what is the difference between truck and passenger car heads. I haven't seen anything saying they're different but have seen people say they're the same.
Anybody have any idea? Thanks
Number Dummy decoded the tag from my engine at one time and said it was a 390 from a 68' Mercury passenger car. The heads are marked C8AE-H.
After researching further I can't find out what is the difference between truck and passenger car heads. I haven't seen anything saying they're different but have seen people say they're the same.
Anybody have any idea? Thanks
Laughing Gas
Joined: Sep 2012
Posts: 860
Likes: 13
From: Asheville, NC
Some of the passenger car heads had different exhaust manifold bolt patterns for the FE class of engines. All pickup trucks used the same bolt pattern. Call the header manufacturer and ask what the port size and bolt hole center to center distance is for what they are selling. Measure yours - if that info is a match there should be no tube clearance issues.
Logistics Pro
Joined: Jun 2018
Posts: 3,553
Likes: 442
The difference is 8 bolt exhaust (truck) or 14 bolt pattern (car)
https://www.diyford.com/choose-ford-...ylinder-heads/
https://www.diyford.com/choose-ford-...ylinder-heads/
Logistics Pro
Joined: May 2008
Posts: 3,670
Likes: 370
From: PHX AZ
The difference is 8 bolt exhaust (truck) or 14 bolt pattern (car)
https://www.diyford.com/choose-ford-...ylinder-heads/
https://www.diyford.com/choose-ford-...ylinder-heads/
16 was usually mustang, cougar while the 14 bolt fairlane, comet all full size got the 8 bolt. Many 8 bolt heads had the bolt boss to drill to 14/16
Thread Starter
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Mountain Pass
Joined: Jun 2018
Posts: 218
Likes: 34
These are just the ordinary looking eight bolt exhaust, however the potential answer seems to be in Christmas' article
"Like other FE heads, the C6AE-R head has an exhaust side with a normal 8-bolt pattern. Heads from 1966-on, including the later truck heads, have the exhaust port in a lowered location while the bolts remained in the same spot. This can make it difficult for some headers to fit because they overlap the port opening causing header leaks and reduced power. Since header manufacturers do not specify which head was used to master their mounting flange, the only way to determine whether any particular headers will fit is to mark and test fit them first."
I think I need to call Hooker
"Like other FE heads, the C6AE-R head has an exhaust side with a normal 8-bolt pattern. Heads from 1966-on, including the later truck heads, have the exhaust port in a lowered location while the bolts remained in the same spot. This can make it difficult for some headers to fit because they overlap the port opening causing header leaks and reduced power. Since header manufacturers do not specify which head was used to master their mounting flange, the only way to determine whether any particular headers will fit is to mark and test fit them first."
I think I need to call Hooker
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 785
From: Simi Valley, CA
I've been looking through old threads in reference to headers. Hooker comp headers were mentioned a couple of time as fitting well.
I looked on the Hooker site at these and they specifically state " will not fit passenger car heads".
Number Dummy decoded the tag from my engine at one time and said it was a 390 from a '68 Mercury passenger car.
The heads are marked C8AE-H
I looked on the Hooker site at these and they specifically state " will not fit passenger car heads".
Number Dummy decoded the tag from my engine at one time and said it was a 390 from a '68 Mercury passenger car.
The heads are marked C8AE-H
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