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Exhaust studs holes, safe to tap to larger thread?

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    Exhaust studs holes, safe to tap to larger thread?

    So as I'm startng to mock up the m106 turbo system on the m30b35, I try to thread in the new exhaust studs and.... they're a completely different size and pitch. See pics below.

    My question is, is it safe to tap the head to the larger m10 size if I take the necessary precautions, such as blocking off the exhaust outlets to prevent shavings and debris from getting in to the cylinders? I really don't want to pull the head, but I'm not sure what else to do.

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