Re: New head studs or no
The only thing you risk is possibly breaking one on install/torquing. And having to start all over.
If you get it in and torqued, its probably good for the life of the head gasket. Maybe longer.
The most severe force a fastener sees in its life is the initial torquing - that if its done right. Thermal cycling is recommended (each cycle measurably relieves the stress) so you're essentially "re-torquing" to bring the initial stretch back. If it survives that, then its good.
Again, if it survives...
Note that new fasteners CAN fail - although the failure rate is significantly lower.
Joe K
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