Impressive numbers.
Stay the course, '69 Camaro's are muscle cars and Yenko's are a historic American icon. HP to weight ratio is HP to weight ratio. Hi-tech HP is cool but not required as without traction control and proper suspension setup there are thresholds.
I'd much rather out prepare and drive someone than win with computer assistance and money.
Payback is a great modern day representative of the true Camaro heritage IMO.
Solely for conservation and environmental reasons fuel injection for the ZL1 could be an acceptable option.

But good suspension and setup will deliver faster times with Iceman at the wheel.