I have a daily 70 charger with a 440 but I'm planning on getting SRP flat top pistons, headers, RPM heads (whole new valvetrain), 5 speed TKO-600, and either 3.55 or 3.73 gears. Just to add, I also have a performer intake and holley carb (which I also need help on deciding a new one, vac secondary but what size). I was wondering which cam I should get, I'm between the Comp XE268H and the XE274H. I've heard good about both for street applications but they're very similar so what are your guys opinions?