Replacing Head Bolts

[General karthief]

Interesting situation, can you remove one head bolt to replace it with a studded head bolt?
It is the lower front head bolt on an engine that will be running around 10psi (or less) with a blower. The studded bolt, new tty ford part, is needed for a bracket, there is a second choice for attaching the bracket that I think will be used. This became a 'can you do this' head scratching moment.
The engine is not a new build, so has some miles on it,

 

[Noobz347]

Are you talking about replacing 1 bolt with a stud or all the bolts with studs?

 

[General karthief]

Just replacing the one head bolt with the correct bolt that ford used to attach the fuel line bracket that goes behind the alternator, the engine has arp bolts and don't provide a bolt that mounts that bracket.

 

[Noobz347]

The problem that I see is that torque is usually different between bolts and studs of even the same manufacturer.

You want to mix bolts/studs from different sets but there's no indication if the clamp force between them is equal.

If it's cast heads, I'd probably do it and never think twice. If it's aluminum heads, I'd be a bit more hesitant about mix/matching torque specifications particularly, in a boosted app.

Not to mention that most ARP hardware calls for a torque compound (oil) to be used.

 

[General karthief]

Not mixing studs with bolts
Put your thinking cap on (not the pretentious one) and remember the bolt that has a threaded stud on top that ford used, the rest are arp bolts, apparently they do not have a bolt with the provision that allows the bracket to be attached, gt40 heads so yes cast not aluminum.
I can't find my crayons so no pictures.

 

[mikestang63]

I think you should be ok

 

[Steel1]

Are we talking head bolts or intake bolts? For the life of me I can't think of a head bolt that had a fuel line attached. Lower intake bolts would make more sense to me but I'm not that bright.

 

[a91what]

Passenger side front most head bolt has a stud on the head for a fuel line bracket.

 

[Steel1]

Passenger side front most head bolt has a stud on the head for a fuel line bracket.

Ah got it....just looked at my 93, must have eliminated mine years ago with on of the many head changes I've done.

 

[General karthief]

Are we talking head bolts or intake bolts? For the life of me I can't think of a head bolt that had a fuel line attached. Lower intake bolts would make more sense to me but I'm not that bright.

If you can remember a stock 5.0 fuel line configuration where the fuel line travels down behind the alternator there is a bracket that is attached to a head bolt that has a threaded top portion, the arp head bolts do not have this threaded top portion
I can figure it's been a long time since some here seen a stock engine comartment that it would be hard to remember.