Why can't you just run torco it makes you at about 102 octane, that's what I run in my 23psi 2.8 cobra and makes 740hp with it..
Btw let me know when you get that Vette or the cobra and can be in Pensacolay car will be done with auto swap this week and back in Florida in a month. Need someone I can run!
Don't know how much of a run it would be. Your car is a beast especially running that through an auto. My Z06 is pretty much stock. Intake and tune putting down around 490. The Cobra is putting down around 780 rwhp 700 rwtq through a 6 speed and beefed up IRS. Car is pretty much full weight 3600 to 3700 lbs. Have yet to get it to a track on the current set up, but your 140 trap is no joke. I need more seat time in it because the car scares the hell out of me. Haha.