If you can drive it across 3 states and run pump gas and go race it, it's probably not all that wild of a combo. My 318 has compression close to 11:1 and iron heads, so it's not going to be super happy on 93/94 octane at a race scenario. I keep 110 in it due to this reason, but also because it can be had out of the pump and keeps great, so technically it's a "pump gas" engine. I'm not advertising it as such, I'll tell everybody and their brother it's 110 octane. Could I drive it across 3 states on pump gas? Maybe, but I'll probably never find out for sure.