10.2 : 1 compression 360 at sea level. Options?

That (water/meth) was my original back-up plan in 1999, when I had the Scr set at 11.3.
My local speed-shop thought I was nuts building an 11.3 engine to run pumpgas. No one around here had ever heard of Dynamic compression, or Effective compression. I had to do all the equations long hand, until I figured it out. If I'd have listened to him, Ida had a dog engine for sure at 9.5 which is what he recommended.
It turns out that at 900ft here;neither 11.3Scr nor 185psi was a big deal for aluminum heads, and 87E10.