My suggestion is to move a little to the south!!!! I understand DA a lot better these days after hanging out with a helicopter pilot, but jeez. You aren't the first person I've heard complain about losing performance after bolting on the NW manifolds. I have a mid-size(68mm) Code3 pulley that could probably help you out, never installed it after buying it from a fellow forum member. No use to me now that our local drag strip closed(I miss you Orlando SpeedWorld). Good luck hitting the 12s up there, I'm still shooting for 12.6s on street tires myself.