The studs breaking are a very common issue on b-series engine, expect more studs to be broken.

The gasket on Integra VTiR are a metal gasket, lasts very long at least till 250000-300000km they say.

To fix the silt and stuff comming from the headers, autobarn has a header gasket seal around $15. It's like a black pastey glue that goes around the header gasket, works a treat! But what I experainced was there was a strange smell that lasted for a few days.

What I reccomend would be a new metal gasket (around $50 max), + new header gasket glue.

Good luck,