It depends on how you want it to drive.
There are single disc clutches that would support that kind of horsepower, but they have the possibility of chattering. The RAM Powergrip HD in an 11" Long would work perfectly fine, give you some "safety factor", and with a light car and a lower rear gear, it would probably be very streetable. However, there's always a possibility that it could chatter....that's my disclaimer.
If you want something that drives like a Honda, then a twin disc, like a McLeod RXT would probably be a better choice. The RST is not a good candidate for a vehicle that will be raced, so you'd have to pay a few hundred more and opt for the RXT.
The flywheel will be your personal choice. IMO, I'd rather have the extra weight of a steel flywheel if you do a lot of light-to-light driving, or if you live in an area where you'd have to take off on a hill, or if your driveway is inclined, etc. The aluminum flywheel will not have the rotating momentum that a steel wheel has, and you will find yourself slipping the clutch to get the car going. I've used both in my own stuff and I prefer the steel.
