gas

I am working on restoring a 1965 Bonneville,389 with 4 barrel, 10.5:1 compression. One of my paramount concerns is fueling the thing. I have done a lot of searching and have yet to find a definitive answer. The question is not correct octane, I can get AKI 93 at a local Cenex, but the question...

I have a 1997 Pontiac GTP and I've been filling up with premium gas because it's supercharged. It's pretty expensive and I'd like to fill it up with regular unless that'd hurt it. I'm ok with using premium but if I don't have to, I wont.