I know you allready mentioned it will be magnum based, but I would like to point out a valve cover with 10 bolts tends to leak less then one with 5 (while still allowing you to bolt up LA covers, should you want to)
my only issue there is Magnum valve covers are very $. We put the LA covers on the MAg heads today. so as long as production doesn't have issues with them leaking, the Mag "extra" bolts will stay. thanks.