Beginner Road Track Racing: Feedback on Engine Options Wanted

With lots of twisties and only one straight, go for the torque of the 5.9.
One suggestion:
If your track offers a driver's school, take it. You'll get some track time with a seasoned instructor and a prepared car. You'll get to learn the particulars of the track, and see for yourself what you'll want the car to do and how it should act; and be able to plan your build accordingly. And you'll be able to network with other drivers/racers/instructors and possibly gain some input that way.