I have done my reasurch and know about different HS and what not. here is the issue. I have a b18b, i am gong to turbo the car, but want to use the head i have in my room. The head was made for an all motor setup so it is shaved around 40 thousands. i have a 30 thousands HG right now, but since stock is 29 thousands, i need a thicked HG. I am not looking to lower my C/R that much. i guss i am looking for like a 40-50 thousands HG, thus allowing me to up my C/R a little, but not enough where it will hurt me. I only plan to run lik e8 psi for now. I know you are going to say sel the head and go from there, i tried, but no one wanted it, so i want to use it. any help is thanks'd