Just wondering if anyone has any feedback on either brand. If so what is your experience, how much boost are you running on what turbo or turbos and what you are revving it out to. Since my darton sleeved block is performing quite well I wanna build the head so I can safely rev to 8k rpm and probably 8500 when I go to a haltech. Have 6 bolt cams currently in the head not sure if im interested in spending 1600 on cams.