To be honest, any head will deliver that performance - even the stockers the engine came with. Modern parts and machining will easilly reach those levels with a mild camshaft. So really, any head you want will do what you want. Given the power level, I wouldn't recommend new heads. 915s or Js will work fine and will be slightly less than a set of EQ Magnums ready to bolt to the engine. And they wouldn't be lift-limited if you wanted to get more cam in it later, and any stock rocker setup, or less expensive aftermarket rockers will work. So up to you but a well done set of stock heads, with 2.02/1.65 valves, new guides, new exh seats, nailhead performance valves, a 5 angle performance valve job will fit the bill past 400hp.
