460 manifold questions

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Jun 29, 2014 | 10:38 AM

jgavac

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Cargo Master

Joined: Oct 2010

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From: Lost In a Pit of Despair

460 manifold questions

Does anyone know what the thread size and pitch is on the EFI 460 manifold A.I.R holes? The large hole in the mani itself, not the threads in the insert.

Thanks
Jameson

Jun 29, 2014 | 11:36 AM

ArdWrknTrk

pedant

Joined: Jan 2008

Posts: 23,576

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From: EXTREME southwest CT

EFI started in 1988.
Maybe you would get a better answer in the '87-'96 forum?

Jun 29, 2014 | 12:11 PM

jgavac

Thread Starter

Cargo Master

Joined: Oct 2010

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From: Lost In a Pit of Despair

I call them EFI manifolds as a general term for later model (than the 70's I'm used to) manifolds. They're on a 86 carbureted RV. Just referring to the smog control holes.

Thanks
Jameson

Jun 29, 2014 | 12:22 PM

ArdWrknTrk

pedant

Joined: Jan 2008

Posts: 23,576

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From: EXTREME southwest CT

They are NOT EFI manifolds, nor anything like them...
EFI manifolds (intake or exhaust) won't fit carburetor heads.

NAPA sells the plugs. #131X6 for a bag of ten.

Here's a link to another post I made.
https://www.ford-trucks.com/forums/1...l#post13573780

Jun 29, 2014 | 12:30 PM

ArdWrknTrk

pedant

Joined: Jan 2008

Posts: 23,576

Likes: 39

From: EXTREME southwest CT

On re reading your original post... these fit into the threaded bung.
If you want the thread in the manifold itself, I'm sorry I don't have that information.

Jun 29, 2014 | 12:35 PM

jgavac

Thread Starter

Cargo Master

Joined: Oct 2010

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From: Lost In a Pit of Despair

Yeah I'm trying to go into the manifold itself. I couldn't get the pipes to release from the bungs. If all else fails, I'll try again to get them off.

Thanks for the help
-Jameson

Jul 1, 2014 | 11:29 AM

jgavac

Thread Starter

Cargo Master

Joined: Oct 2010

Posts: 2,339

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From: Lost In a Pit of Despair

The manifold has 5/8-18 threads, which is 5/8NF.

-Jameson

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Jul 1, 2014 | 04:02 PM

NumberDummy

Ford Parts Specialist

Joined: Nov 2006

Posts: 88,826

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From: Simi Valley, CA

390148-S36 .. Connector (connects 9B445 to exhaust manifold) / 3/8" inverted flare x 5/8" straight end.

Pic at right: Look at the last entry in 9B445-6.

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