Is 9.7:1 compression on iron heads too much for 91 octane

Thanks for all the replies. I think the domed pistons may cause me too much grief and limit my options so I’m going to stick with the kB199 flat tops for my 318. The flat tops will also allow me to run a closed chamber head should I so desire.
Flat tops, zero-deck, aluminum heads, and very high-pressure is a winning combo.
But properly fitted domed pistons in an open chamber, set up right to avoid detonation, can be every bit as potent, you just gotta pay attention to a few things..... while with aluminums you can just about throw anything together.