Truck was running so smooth it would make you cry-pulled it in shop and installed ARP head studs-put everything back together,now running very rough and no power and about every 30 seconds to one minute hits like it's trying to fire out of time.Went back last night and rechecked valve lash and did visual everything seems ok.Also plugged and unplugged injector harness connectors and wiggled wires around hoping for a change,nothing.Did not remove pushrods when doing studs,felt like they were all in place on lower end before I installed rockers-could they be out of place down at the cam?Only other thing,I had to disconnect the apps box and and move over a little bit.I tryed doing reset on apps-nothing.Really needing some other input from others as I don't know where to go next.THANKS! 04.5 3500 smarty Jr. ATS compound turbos