Peace of mind really, the bolt holes in the rocker shaft pedestals are not helicoiled just tapped into the aluminium. I don't want to trash the threads so I would rather have studs there so I can get full thread engagement in the head don't have to take them back out once they're in.
But I might just be over thinking it.
Just to clarify I'm not using Trick flow heads - China castings.
Thanks mate, I'll contact these guys and see if they offer international shipping.