Firsties! Read read read as others will say.
http://www.gnttype.org/
http://www.vortexbuicks-etc.com/
Make the car run well as it is and race it as it is and get your baseline. Change one part at a time and see what it does. It's satisfying to hit goals, but then you need new goals, and more $, so don't be in a hurry. The journey is the best part. And other will attest as will I, too many parts too fast does not make a fast car.
Welcome! Nothing better in the world than a ride in a well tuned turbo Buick.