9:1 or 8.5:1

Well after talking to the owner, and listening to him i realized how much abuse this car has in its future. I see the lower compression being a better way to go as far as reliability issue are concern.Not sayin that the CR will directly affect reliability but the fact of the hand holding the bosst controller, once it is no longer in my possesion.That is how it got in to my hands in the first place.