10.2 : 1 compression 360 at sea level. Options?

Dangerous? No, you just have to pay attention to timing etc. I ran 10.2:1 SCR on a short duration cam for about 95k miles way back in the 70's-80's. Had to not go high on total timing and ran premium. Wore the engine out with that.

BTW, a cool, dry fall day is the biggest challenge; dense air and no humidity to moderate the combustion process. So you are at a good time of year to work on this.