| Matt:
I 'think' I know where you're coming from.  After exhausting everything else I 
could
think of, I ended up by drilling out those studs to remove the tower, prior to
reconditioning the head.
Unable to find replacement studs in Kona (or from the vendors I tried) I ended 
up by
using hex head bolts to reattach the tower.  The machine shop I used to 
recondition the
head, chased the threads for me.
The bolts I used to replace the studs were M10, 1.50 thread pitch.
Hope that helps.
Dave
'68 1600
Kailua-Kona
Matt Jacquet wrote:
> List,
>
> Anyone know the thread size for the tapped hole on the head that mates with 
>the stud
> securing the water filler housing on a stock 68 R16 head.
> Need to chase it with a tap.
>
> Thanks again!
> Matt
 |