you can cc chambers easy enough but getting equal power out of each cylinder is extremely tough. bone stock cars would vary maybe by 6-7mph at the track from some cars just hitting better than others. the only way to do it is with a four EGT sensors and a standalone that can control each cylinder, heck have compression vary by 10psi on a compression check is monster on these engines. I would say 75% are running around with at least that much variance. second biggest problem is intake manifold, it just doesnt distribute air equally no matter what you do.