I need help with a project I am doing. I have a 91 b18a1 and I am currently rebuilding it. I was wondering about raising the compresion. I have p3 pistons and I was thinking about shaving the deck or the head. does it matter which one is done?If I do shave it how much. I also have crower stage 3 cams and titanium valve springs. so please any info or link that could get me the information would be appreciated.