Novice racer on dirt track seeking some advice

I have a 73 Duster with a 318, torque flight 727, 8.25 rear end, 360 four barrel intake, with holly 600cfm carb. I just finished my first season on the dirt track. I am looking to build up the car over the winter with some limitations. I am looking for any advise on how to keep my car stock but get every bit of horse power out of it.(yes i know that the four barrel did not come with it but got it ok'd by the track.) I am all ears so if you have something let me know.

:burnout: