3FE head bolts vs. 2F head bolts (1 Viewer)

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I am rebuilding a 3FE engine and I haven’t gotten my engine manual yet. On the 2F there is a head bolt that is skinnier. My understanding it was for the oil gallery passage thing. The 3FE does not have a skinnier head bolt. Does the 3FE head not have one skinnier head bolt?
 

OSS

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These are the headbolts used on the 2F and 3F-E. Each one uses 15 bolts but it looks like the 3F-E uses two longer ones instead.

2F(Total of 15)
90910-02050
( 15 )
*13-1.75PX120.5-27
(08/1980 - 08/1987)

3F-E (Total of 15)
90105-13005
( 2 )
*13-1.75PX138-27
(08/1987 - 01/1990)

90910-02050
( 13 )
*13-1.75PX120.5-27
(08/1987 - 01/1990)
 
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Spook50

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Man I really wish ARP made a head stud set for the 3FE.

I know that contributes nothing. Just throwing my wishful thinking out there.....
 
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Man I really wish ARP made a head stud set for the 3FE.

I know that contributes nothing. Just throwing my wishful thinking out there.....
I get it. There’s not much out there. I bagged and numbered each one but didn’t compare them. Good information. Thanks
 
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I get it. There’s not much out there. I bagged and numbered each one but didn’t compare them. Good information. Thanks
So as long as I got it correct, two long bolts on the bracket and no narrow one for oiling.
 

cruisermatt

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The 2F and 3FE head bolts are the same (90910-02050) besides the two at the front left of the 3FE cylinder head that are longer to accommodate the smog pump bracket. These are the ones @OSS is referencing with 90105-13005
 

Spook50

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Why though, completely no point on this engine lol
On a performance level, I completely agree. You can get much more consistent torque across multiple fasteners when you're torqueing a nut onto a stud or onto a bolt than you do when torqueing a bolt. Granted these engines already last 300K+ miles without head gasket & head issues, but it's admittedly one of my weird OCD quirks.

I did NOT know though that the 2F and 3FE head bolts are the same. My smog pump is long gone so I could probably eliminate the bracket if/when the head ever gets pulled. That's a good thing to know.
 

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