carb choice and slick size

If you're going to race it, I would definitely start with a Holley (Proform, Quick Fuel, etc) 750dp. Like 70aarcuda said, take a look around at the track...unless it is a rules restricted application, 99% of the cars will have a Holley style carb. This is not by chance, its because they just make more power.

Completely off topic, which track do you race at in Indiana? I race Lucas Oil Raceway most of the summer (and a few other tracks)...just curious :-)