I may have messed up here.....

I am going to run premium pump fuel which is 99/100RON here in England, equivalent to your 93/94MON I think, plus an octane booster which will work out to about 97/98MON.
As regards thicker gaskets, does that not have a detrimental effect on quench? Am I right in thinking that in itself can cause pinking / detonation issues?

Rod length by the way is 6.760”