I have a 454 bored .030 over I have flat top pistons with 781 heads with a comp cam xe268h cam so from what I've read I should be in the 8:1 compression ratio and I want to get into the area of around 9.5:1 so my question is what is a better way to do it, to get different heads with a smaller combustion chamber or go with dome pistons to reach my goal and why? Oh yea this is in a K5 Blazer that will be mostly driven in the sand dunes and occasionally in the street. Thanks in advance......