gasoline

Hi, I was wondering if you could help answer a few questions and doubts I have about moving forward with my E85 build. I know there’s a lot of hype about E85 being corrosive and I know there are measures to take to make that less possible in the fuel lines, pumps, and filters but

Q: I recently rebuilt a 383 for my 1968 Charger. It’s not a race car, but a typical street cruiser and occasional quarter-mile warrior. My question is about fuel. I’m not certain how much fuel additive or 100 octane aviation gas is enough, too much, or even necessary at all. Some people say it’s pointless