964 head Stud Question
 

Guys,

I am putting together a motor that is twin plug.
This would be my second motor I have built being twin plugged.
One of the problems I have is clearance is tight between the socket/spark plug and the barrel nut that holds the head on with the existing combo.
So seeking to avoid that problem on this motor I was planning on using a 964 Head stud nut. (P/N: 964 104 382 01)
From what I have been able to glean from the PET Diagrams, No washer is used under these nuts. (Image Attached.)
The part in question is #18 in the diagram.
However I am suspect that is the case. So before I do something colossally stupid.
Does anyone have any first hand info as to how this is assembled?
Taking that into account if in fact a washer is not needed would that potentially change the install height of the stud into the case?

Thanks for any available help

http://forums.pelicanparts.com/uploa...1608706281.PNG

Motor break down for people wondering because why not share, everyone likes motor specs right?

The motor is a 2.8 Twin Plug
2.7 7R case fully machined
Ported heads
Twin plug JB Racing distributor
AASCO springs and retainers
10.5:1 CP coated pistons
DC60 cams
964 Oil pump
Everything balanced
Stock rods with ARP Hardware
Headers to suit
and I have a choice of 40 and 46 carbs to test.

Performance Performance Cylinder Head Stud Kit
 

I'm using Henry Schmidt's Supertec Performance Cylinder Head Stud Kit, SPTC-HSK-1, in my 87 3.2L to 3.4L twin plug build.

From twin plug ignition: 12mm or 14mm spark plugs

Edit
Scott and I are refencing the same thread.

Thanks for the links, however it does not really answer the question that I asked.

The 964 nut will probably be no help with clearance, it is pretty tall. Why not get a set of ARP 12 point head nuts and use the existing washers (or replace with ARP washer)?

964 nut will not fit early head without turning the washer part
Down a little to fit the head otherwise they are better than nut and
Washer
Use a plug with a 5/8 head and you won’t have issues

So Is that to say the 964 nut does not use a separate washer?
Thats the only question I wanted answered here.

I use spark plugs with 16mm, about 5/8, hex in my engines. Zero problems fitting a standard spark plug socket down in the heads.
Best "upgrade" ever, right after a high torque starter.
I have no idea why someone would use the original big hex spark plugs....

Yes washer is part of nut

Thank you.

Just updating this to say this is what i did and it worked perfectly.
thank you for the idea.