you can run 12 to 1 if you would like as long as you dont abuse the motor, which you said you wouldnt. if you are going to supercharge, wiy put a longer stroke in it. the shorter stroke is so much more boost aplyable as far as stock sleeves go. now if you are going to sleeve it then go with a freakin stroker kit if you would like with boost. its up to you and what you think the smartest decisions are but the ls crank will work wit ls sized rods.