There was very similar b20 in our country (RS's 84,5) and reved till 9 grand showed 220KM. After valvetrain change (BC4's set) - 242KM B20 on B18 crank - 9k FTW.
Yep. just use a different bolt.
Its a genuine J's so possibly different shape?
So something near 220HP and 200Nm is possible - depend of the redline. To be honest - I would prefer lower redline nad more Nm from midrange thanks to bigger stroke. But ofcourse everyone has his own road of modifications
when you getting a koyo rad then lee?