Blind head bolts do not go into water - they are dry at the bottom. This means that the bolt holes themselves are not the problem.
The only places
oil will get into water are the aforementioned
oil feeds for the heads or the head gasket itself. i have never made the AERA recommended
oil feed repair - but I have read about it for years - so it'd be a fair bet that it could either have been done wrong - or could actually be the cure for your problem.
100 pounds is within the factory head bolt torque spec range for an FE using oil. I normally go 90-95 pounds with ARP lube, which BTW is higher than ARP's recommendations....
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Survival Motorsports
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Engine Masters Challenge Entries
91 octane - single 4bbl - mufflers
2008 - 429 cid FE HR - 675HP
2007 - 429 cid FE MR - 659HP
2006 - 434 cid FE MR - 678HP
2005 - 505 cid FE MR - 752HP