Red six header bolts

[Glenn 'Stinky' Stankevicius]

Is the last bolt hole on the head (closest the firewall) supposed to have a bolt, stud and nut or just a locating stud?
I have fitted a locating stud as per my torrie manual and the two other red six powered cars I have. It just seems a little weak holding the last pipe on one side.
How do I test for exhaust leaks? just to satisfy my paranoia.
Cheers

[colt]

Glenn, all my reds have had a locating stud in the last hole.
Colin

[colt]

I just re-read the heading, Glenn. I was talking about the original manifold. With extractors they remove the stud & use a bolt.
Colin

[Glenn 'Stinky' Stankevicius]

Thanks, looks like I am up for some fun in Adelaide's 30+ degree heat!
Good excuse to tidy up some firewall welds too I guess  
Thanks Colin.