I have a little dilema here. I've been thinking about getting a B20z bottom end to build and eventualy put with my exsisting setup. I'm wondering if its worth molesting my stock B16a but i need some tq and i'm not sure if there are better ways. I don't plan on re-sleeving it or even boreing it over the stock 84mm. My main question is what would i need to do along the lines of rods/pistons, to be able the rev it to 8,000 + rpms?