I'm in Australia and I have one of those blocks. Will get the replacement studs in any event, and most definitely agree with your comments.
At least some of us found out before the block has gone into use (phew).
It does raise SERIOUS concerns about the integrity of the block overall. Any feedback on this would good... I see someone windowed a World block not long ago on this site .... I have one that was the most consistant and trouble free 572 B1 motor I have built to date. I had my machinest check the studs and they were ARP, so we put it together and I'll be using it next year. It makes 1000+ so, I wouldn't be afraid of them. And I think the other guy that windowed one was 66CHARGER, or something in Oregon. That had nothing to do with the block.
