Let's go N/A!!

Alright, my head gasket is almost gone in 91 civic std so i am going to replace but i had what seemed like a good idea. If a put a thinner head gasket in and shave the head a little to bump up the compression ratio, i might be able to put out more power. Only problem is, how thin, what ratio, and how much power? Any help would be great. By the way i run 93 octane already and it will be street driven so i don't think a 14:1 ratio will work!