I say in the 180 to 190 cc intake runner size. Get straight plugs so they don't interfere with headers.
But, Vortec or any decent small chamber head would work with the 290 HP cam and perk the motor up. Obviously vortec heads would need some different springs and retainers to match the lift. With Blue LS2 springs and some Comp retainers they make for around .570-.580 lift on vortec heads.
OK so if I get the vortec heads would the camera I have which is a summit 1105 work with the stock Springs till I get the blue spring..