I have installed a bc cam 218,222 into a 5.3 gen 3, and I just tune to work on ve only, no maf idle adjustment etc, also already tune the transmission and feels a lot better, but I have no low end power, hits wot after 2500rpms to 3k and it runs great, do I have to modify big time the spark high octane table, can you guys point me in the right direction? Working right now so no log file many thanks.