first of all, why?
secondly, you can use h23 crank and rods to up it to h23 displacement.
third of all, its pointless.
boost it and you'll have all the power you could ever want.
look at all the top top drag cars. most are running stock-ish bore (81-83mm) gsr's and boosted to all hell. few are stroked.
hondas = revs.
stroking = low end torque, less top end revs.
when you go fucking with the geometry of the motor, it kills its purpose.
if you want a torquemonster, you're not going to have a high end horsepower monster. end of story.
look at diesels- they make like 150 hp and 400 ft lbs, and top out at 3-4 grand.