I'd leave it on gas. Yes you'll make more power, run quicker & cooler on alcohol, but the tradeoff in terms of maintenance and wear just isn't worth it. Especially on a pro street car. Alcohol carbs and injection idle fairly rich to help throttle response and starting, and WILL dilute/milk the oil. If set up properly, allowed to warm up and not cooled too quickly, it's not as bad, but it's still there....basically, if you want an engine that will run for several seasons without any major issues, run gas. If you want that extra tenth or two, the superior cooling and consistency, and don't mind completely freshing up your engine every year, run alky.