I'd start with the master that matches your Corvette front brakes year since that's where 70%+ of your braking is going to come from
Since you are mixing and matching brake systems, I'd put an adjustable proportioning valve on the rear brakes and play with it until the rears lock up just before the fronts
https://www.jegs.com/i/JEGS/555/6302...6bju2d9wVCqhvc