Edelbrock heads do not require special rocker arms. You can use factory rocker arms with a mild flat tappet cam. For a fairly mild engine the next step up from factory stuff would be a set of nodular rocker arms. They are harder to find these days but sometimes you can round up a set of Crane or Isky nodulars. Next up from them would probably be the Comp steel rockers or perhaps the Mancini aluminum ones. Hughes makes a decent mid-price set and then you start to pay more for the Harland and T&D and stuff like that.