if i was going to destroke a h it would be using the f20b crank and rods . i dont realy care about reving my car to 10,000 so ill stick with bigger is better lol. I do have a good f20b crank and rods. hell I got a complete motor maybe ill play around with it and see what it would do . I would rather put a f23 crank in it and build the piss out of it though lol .

Balance shaft kit will work with f series just the same.