rwhite- What kind of power are you looking to make? And with what block/head combo?
In all honestly I would try to avoid using an O-ring setup on a car that sees primarilly street duty. And for the exact reason Tom stated, if something goes wrong it's going to take out the whole motor rather than just a head gasket.
Studs with an MLS gasket will hold 1khp so it shouldn't be a big problem for 95% of the cars out there. If you are using an 18 bolt head it's even stronger.
Not exactly the same, but I used regular ole copper gaskets (no o-rings) with arp studs and put 1380 to the wheels with no problems at all. This was in a 506ci V10 at 16psi and a pretty safe tune though, so cylinder pressures were probably less than on Toms 406.
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