I would get some ARP headstuds, since you'll be opening it up anyway. Make sure you pre-torque them to about 10 lb-ft to make sure thay're all even. I don't care what ARP says, "finger-tight" usually leaves them sitting at different heights, which obviously means they're not seated all the way. This can happen even when you run a tap down the threads before installing the studs, so double-nutting them and torquing them slightly is a very good idea.