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header bolts have smaller wrench heads that give more flexibility in tight spots. Do you find that you miss not having that with the studs and nuts on headers?
To the OP: if you felt the bolts already “give way” when torquing, it’s over. Don’t muck about any
more, pull the heads and chase/repair the threads as outlined above. Otherwise you will just continue to chase the problem.
To prevent stripping the aluminum head I use 5/16 ARP header studs. Very easy to install the gaskets and headers.
I'm not sure what you mean? 5/16th is much smaller than a typical 3/8ths bolt.
To the original poster. head studs never strip the block out.