Running on Speed Density for Autocross

Hi all. I have a 98 corvette. I compete in autocross with this car and I'm limited on what I can modify. I can change air intake up to throttle body and exhaust is open to play with, as well as tuning the car. I am running it in SD to eliminate the MAF in the intake as a way to benefit with higher airflow values. I have a wideband hooked up and I run headers to 3" exhaust. I thought it would be worth the effort to ask what folks here may have for tips and tricks to sneak every last bit of HP out of this stock LS1. Up to now I have kept it in open loop and keep a very close eye on AFR. What opportunities might I be missing? Suggestions?